Complex terrain wind resource estimation with the wind-atlas method: Prediction errors using linearized and nonlinear CFD micro-scale models

Save this PDF as:
 WORD  PNG  TXT  JPG

Size: px
Start display at page:

Download "Complex terrain wind resource estimation with the wind-atlas method: Prediction errors using linearized and nonlinear CFD micro-scale models"

Transcription

1 Downloaded from orbit.dtu.dk on: Jan 05, 2016 Complex terrain wind resource estimation with the wind-atlas method: Prediction errors using linearized and nonlinear CFD micro-scale models Troen, Ib; Bechmann, Andreas; Kelly, Mark C.; Sørensen, Niels N.; Réthoré, Pierre-Elouan; Cavar, Dalibor; Ejsing Jørgensen, Hans Publication date: 2014 Document Version Author final version (often known as postprint) Link to publication Citation (APA): Troen, I., Bechmann, A., Kelly, M. C., Sørensen, N. N., Réthoré, P-E., Cavar, D., & Ejsing Jørgensen, H. (2014). Complex terrain wind resource estimation with the wind-atlas method: Prediction errors using linearized and nonlinear CFD micro-scale models European Wind Energy Association (EWEA). [Sound/Visual production (digital)]. European Wind Energy Conference & Exhibition 2014, Barcelona, Spain, 10/03/2014 General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights. Users may download and print one copy of any publication from the public portal for the purpose of private study or research. You may not further distribute the material or use it for any profit-making activity or commercial gain You may freely distribute the URL identifying the publication in the public portal? If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.

2 Complex terrain wind resource estimation with the wind-atlas method: Prediction errors using linearized and nonlinear CFD microscale models. Ib Troen, Andreas Bechmann, Mark C. Kelly, Niels N. Sørensen, Pierre-Elouan Réthoré, Dalibor Cavar, Hans E. Jørgensen

3 Outline Wind Atlas Analysis, Wind Atlas Application (WAsP) The linear model (BZ) Known deficiencies in complex terrain and possible remedies The fully nonlinear RANS model (Ellipsys3D) Form drag issue Validation Delta-RIX revisited Conclusions

4 Wind Atlas Analysis (IBZ) Wind measuring site Maps, location Height Sector wise histograms of measured winds Orographic flow model (BZ) Roughness change model (IBL) Wind Atlas data set Orographic correction factors, turning Roughness change factors Effective upstream roughness, land fraction Stability correction Corrected histograms up transformation: histograms of Geo-wind down transformation: to std z over std z0s Weibull fitting

5 Wind Atlas Application (IBZ) WT data Target site Maps, location Height Ressource data: mean, power Orographic flow model (BZ) Roughness change model (IBL) Wind Atlas data set Orographic correction factors, turning Roughness change factors Effective upstream roughness, land fraction Interpolation and stability correction Target Weibull parameters Upstream Weibull parameters

6 Wind Atlas Analysis (CFD) Wind measuring site Maps, target area Height, location Sector wise histograms of measured winds 3D grid generation Terrain flow model (Ellipsys) Terrain flow corrections Corrected histograms Terrain flow corrections result volume Wind Atlas data set Effective upstream roughness, land fraction Stability correction up transformation: histograms of Geo-wind down transformation: to std z over std z0s Weibull fitting

7 Wind Atlas Application (CFD) WT data Maps, target area Height, location Ressource data: mean, power 3D grid generation Terrain flow model (Ellipsys) Terrain flow corrections result volume Wind Atlas data set Terrain flow corrections Effective upstream roughness, land fraction Interpolation and stability correction Target Weibull parameters Upstream Weibull parameters

8 BZ model Linearized spectral flow model for neutral boundary layer. Spectral expansion in terms of Fourier-Bessel series in polar coordinates with zooming radial grid distances Calculates flow perturbation only at the central point. Very fast for calculating flow perturbation at single points in the terrain, and vertical profiles. Integrated in WAsP June 2015

9 Linear model forcing term Figure adapted from Wood and Mason 1993: The pressure force induced by neutral, turbulent flow over hills QJRMS, vol 119, pp

10 Ruggedness IndeX (RIX) from: Bowen, A.J. and Niels G. Mortensen (2004): WAsP prediction errors due to site orography Risø-R-995(EN)

11 Ellipsys3D Multiblock finite volume discretization of the incompressible Reynolds Averaged Navier-Stokes (RANS) equations in general curvilinear coordinates Neutral atmospheric stability in WAsP-CFD configuration Fully dynamic model with nonlinear terms, energydissipation two equation turbulence closure One simulation (steady state) for each of 36 upstream wind directions

12 Ellipsys surface grid Diameter = 30 km

13 Volume grid

14 Result 3D volume for each of 36 directions

15 Formdrag small scales: roughness

16 Form drag larger scales In CFD physics, but B.C.s, not in IBZ, link to RIX?

17 Validation 9 complex sites, each with several masts Levels from 10m (1 site with 5 masts) to 100m (1 site, 2 masts) Mast distances from ~1 km to ~15km Sites in Europe, Americas, A-Asia

18 Site example with (2km by 2km) CFD tile

19 Horizontal 10m-20m

20 Horizontal 30m-40m

21 Horizontal 50m-60m

22 Horizontal 80m-100m

23 All upwards extrapolations

24 All horizontal predictions by distance

25 , Delta-RIX revisited

26 Finer scale features - example BZ CFD Slopefix Delta-RIX

27 Conclusions Wind Atlas method in WAsP has been extended to allow for more advanced flow modelling (via Cloud). Validation of system against available complex terrain data show significant improvement of CFD over linearized flow model. CFD can give additional siting information (TKI, tilt) For the specific use of predictions from well exposed locations to well exposed locations the delta-rix correction show good skill in reducing the error variance of the linear model, but correction aliasing to larger scales could be an issue. Slanted extrapolations? Combination with moderate landfill? The delta-rix method depends, however, on some empirical fitting of parameters, but is otherwise very convenient. More (complex) site data would be very desirable for further validation. Large scale field experiments in complex terrain are needed to help improve physical models and to guide the simpler ones (NEWA project).

28 Thanks for your attention!

Prediction of airfoil performance at high Reynolds numbers

Prediction of airfoil performance at high Reynolds numbers Downloaded from orbit.dtu.dk on: Jul 01, 2016 Prediction of airfoil performance at high Reynolds numbers. Sørensen, Niels N.; Zahle, Frederik; Michelsen, Jess Publication date: 2014 Document Version Publisher's

More information

EWEA CREYAP benchmark exercises: summary for offshore wind farm cases

EWEA CREYAP benchmark exercises: summary for offshore wind farm cases Downloaded from orbit.dtu.dk on: Jan 07, 2016 EWEA CREYAP benchmark exercises: summary for offshore wind farm cases Mortensen, Niels Gylling; Nielsen, Morten; Ejsing Jørgensen, Hans Publication date: 2015

More information

WindScanner systems. Vasiljevic, Nikola. Publication date: 2014. Document Version Peer reviewed version. Link to publication

WindScanner systems. Vasiljevic, Nikola. Publication date: 2014. Document Version Peer reviewed version. Link to publication Downloaded from orbit.dtu.dk on: Jun 30, 2016 WindScanner systems Vasiljevic, Nikola Publication date: 2014 Document Version Peer reviewed version Link to publication Citation (APA): Vasiljevic, N. (2014).

More information

Loads and response from steep and breaking waves on monopiles

Loads and response from steep and breaking waves on monopiles Downloaded from orbit.dtu.dk on: Jan 12, 2016 Loads and response from steep and breaking waves on monopiles Bredmose, Henrik; Schløer, Signe; Sahlberg-Nielsen, Lasse; Slabiak, Peter ; Larsen, Torben J.;

More information

Results of wake simulations at the Horns Rev I and Lillgrund wind farms using the modified Park model

Results of wake simulations at the Horns Rev I and Lillgrund wind farms using the modified Park model Downloaded from orbit.dtu.dk on: Feb 15, 216 Results of wake simulations at the Horns Rev I and Lillgrund wind farms using the modified Park model Pena Diaz, Alfredo; Réthoré, Pierre-Elouan; Hasager, Charlotte

More information

Modifications to the current WAsP engine for Online WAsP

Modifications to the current WAsP engine for Online WAsP Downloaded from orbit.dtu.dk on: Sep 22, 2016 Modifications to the current WAsP engine for Online WAsP Pena Diaz, Alfredo; Troen, Ib; Bechmann, Andreas; Kelly, Mark C.; Rathmann, Ole Steen; Heathfield,

More information

QUICK GUIDE - WASP-CFD IN WINDPRO. Draft 1 edition: 01.02.2013. Purpose: EMD International A/S, Aalborg February 1 st, 2013

QUICK GUIDE - WASP-CFD IN WINDPRO. Draft 1 edition: 01.02.2013. Purpose: EMD International A/S, Aalborg February 1 st, 2013 EMD International A/S, Aalborg February 1 st, 2013 QUICK GUIDE - WASP-CFD IN WINDPRO Draft 1 edition: 01.02.2013 Purpose: To purpose of the WAsP CFD model in WindPRO is to enable the WindPRO user to calculate

More information

The DTU 10-MW Reference Wind Turbine

The DTU 10-MW Reference Wind Turbine Downloaded from orbit.dtu.dk on: Nov 22, 2015 The DTU 10-MW Reference Wind Turbine Bak, Christian; Zahle, Frederik; Bitsche, Robert; Kim, Taeseong; Yde, Anders; Henriksen, Lars Christian; Hansen, Morten

More information

Including thermal effects in CFD simulations

Including thermal effects in CFD simulations Including thermal effects in CFD simulations Catherine Meissner, Arne Reidar Gravdahl, Birthe Steensen catherine@windsim.com, arne@windsim.com Fjordgaten 15, N-125 Tonsberg hone: +47 8 1800 Norway Fax:

More information

Comparison of Resource and Energy Yield Assessment Procedures

Comparison of Resource and Energy Yield Assessment Procedures Comparison of Resource and Energy Yield Assessment Procedures Niels G. Mortensen and Hans E. Jørgensen Wind Energy Division, Risø DTU EWEA Wind Resource Assessment Technology Workshop 2011 F Acknowledgements

More information

CFD SIMULATIONS OF WAKE EFFECTS AT THE ALPHA VENTUS OFFSHORE WIND FARM

CFD SIMULATIONS OF WAKE EFFECTS AT THE ALPHA VENTUS OFFSHORE WIND FARM CFD SIMULATIONS OF WAKE EFFECTS AT THE ALPHA VENTUS OFFSHORE WIND FARM Annette Westerhellweg, Thomas Neumann DEWI GmbH, Ebertstr. 96, 26382 Wilhelmshaven, Germany Phone: +49 (0)4421 4808-828 Fax: +49 (0)4421

More information

Fremtidens vindenergi en magisters historie på Risø og DTU

Fremtidens vindenergi en magisters historie på Risø og DTU Downloaded from orbit.dtu.dk on: Oct 26, 2015 Fremtidens vindenergi en magisters historie på Risø og DTU Mortensen, Niels Gylling Publication date: 2015 Document Version Author final version (often known

More information

O.F.Wind Wind Site Assessment Simulation in complex terrain based on OpenFOAM. Darmstadt, 27.06.2012

O.F.Wind Wind Site Assessment Simulation in complex terrain based on OpenFOAM. Darmstadt, 27.06.2012 O.F.Wind Wind Site Assessment Simulation in complex terrain based on OpenFOAM Darmstadt, 27.06.2012 Michael Ehlen IB Fischer CFD+engineering GmbH Lipowskystr. 12 81373 München Tel. 089/74118743 Fax 089/74118749

More information

2.3 Wind Energy Utilization

2.3 Wind Energy Utilization Module 2.3 Wind Energy 2.3 Wind Energy Utilization Gerhard J. Gerdes Workshop on Renewable Energies March 9, 2005 Majuro, Republic of the Marshall Islands Content Global and local wind systems Influence

More information

Testing of a new morphing trailing edge flap system on a novel outdoor rotating test rig

Testing of a new morphing trailing edge flap system on a novel outdoor rotating test rig Downloaded from orbit.dtu.dk on: Jan 05, 2016 Testing of a new morphing trailing edge flap system on a novel outdoor rotating test rig Aagaard Madsen, Helge; Barlas, Athanasios; Løgstrup Andersen, Tom

More information

F&U som støtte for innovation og konkurrencedygtighed

F&U som støtte for innovation og konkurrencedygtighed Downloaded from orbit.dtu.dk on: Feb 02, 2016 F&U som støtte for innovation og konkurrencedygtighed Madsen, Peter Hauge; Buhl, Thomas Publication date: 2014 Link to publication Citation (APA): Madsen,

More information

Eu-NORSEWInD - Assessment of Viability of Open Source CFD Code for the Wind Industry

Eu-NORSEWInD - Assessment of Viability of Open Source CFD Code for the Wind Industry Downloaded from orbit.dtu.dk on: Jun 28, 2016 Eu-NORSEWInD - Assessment of Viability of Open Source CFD Code for the Wind Industry Stickland, Matt; Scanlon, Tom; Fabre, Sylvie; Ahmad, Abdul; Oldroyd, Andrew;

More information

Integrating WAsP and GIS Tools for Establishing Best Positions for Wind Turbines in South Iraq

Integrating WAsP and GIS Tools for Establishing Best Positions for Wind Turbines in South Iraq Integrating WAsP and GIS Tools for Establishing Best Positions for Wind Turbines in South Iraq S.M. Ali Remote Sensing Research Unit, College of Science, Univ. of Baghdad, Baghdad, Iraq deanoffice {at}

More information

A. Hyll and V. Horák * Department of Mechanical Engineering, Faculty of Military Technology, University of Defence, Brno, Czech Republic

A. Hyll and V. Horák * Department of Mechanical Engineering, Faculty of Military Technology, University of Defence, Brno, Czech Republic AiMT Advances in Military Technology Vol. 8, No. 1, June 2013 Aerodynamic Characteristics of Multi-Element Iced Airfoil CFD Simulation A. Hyll and V. Horák * Department of Mechanical Engineering, Faculty

More information

Modeling wind flow using O.F. Wind, an OpenFOAM based CFD tool: validation of Turbulence Intensity in a testing Suzlon Energy site Ltd.

Modeling wind flow using O.F. Wind, an OpenFOAM based CFD tool: validation of Turbulence Intensity in a testing Suzlon Energy site Ltd. Modeling wind flow using O.F. Wind, an OpenFOAM based CFD tool: validation of Turbulence Intensity in a testing Suzlon Energy site Ltd. L.Casella 1, W.Langreder 1, A.Fischer 2, M.Ehlen 2, D.Skoutelakos

More information

46200 Planning and Development of Wind Farms: Wind resource assessment using the WAsP software

46200 Planning and Development of Wind Farms: Wind resource assessment using the WAsP software Downloaded from orbit.dtu.dk on: Jan 30, 2016 46200 Planning and Development of Wind Farms: Wind resource assessment using the WAsP software Mortensen, Niels Gylling Publication date: 2014 Document Version

More information

Context and purposes. Wind characteristics

Context and purposes. Wind characteristics Context and purposes The SWIP project ( New innovative solutions, components and tools for the integration of wind energy in urban and peri-urban areas ) aims to expand the market for Small Wind Turbines

More information

Wind resources and wind turbine wakes in large wind farms. Professor R.J. Barthelmie Atmospheric Science and Sustainability

Wind resources and wind turbine wakes in large wind farms. Professor R.J. Barthelmie Atmospheric Science and Sustainability Wind resources and wind turbine wakes in large wind farms Professor R.J. Barthelmie Atmospheric Science and Sustainability Overview Wind resource of Egypt Based on Wind Atlas for Egypt Wind turbine wakes

More information

ESSENTIAL COMPUTATIONAL FLUID DYNAMICS

ESSENTIAL COMPUTATIONAL FLUID DYNAMICS ESSENTIAL COMPUTATIONAL FLUID DYNAMICS Oleg Zikanov WILEY JOHN WILEY & SONS, INC. CONTENTS PREFACE xv 1 What Is CFD? 1 1.1. Introduction / 1 1.2. Brief History of CFD / 4 1.3. Outline of the Book / 6 References

More information

Virtual Met Mast verification report:

Virtual Met Mast verification report: Virtual Met Mast verification report: June 2013 1 Authors: Alasdair Skea Karen Walter Dr Clive Wilson Leo Hume-Wright 2 Table of contents Executive summary... 4 1. Introduction... 6 2. Verification process...

More information

Wave driven wind simulations with CFD

Wave driven wind simulations with CFD Wave driven wind simulations with CFD DeepWind'2013, 24-25 January, Trondheim, Norway Siri Kalvig 1, Richard Kverneland 2 and Eirik Manger 3 1 StormGeo, Norway 2 University of Stavanger, Norway 3 Acona

More information

Renewable energy target and strategy in Denmark

Renewable energy target and strategy in Denmark Downloaded from orbit.dtu.dk on: Jul 07, 2016 Renewable energy target and strategy in Denmark Hasager, Charlotte Bay Publication date: 2015 Document Version Peer reviewed version Link to publication Citation

More information

NUMERICAL SIMULATION OF REGULAR WAVES RUN-UP OVER SLOPPING BEACH BY OPEN FOAM

NUMERICAL SIMULATION OF REGULAR WAVES RUN-UP OVER SLOPPING BEACH BY OPEN FOAM NUMERICAL SIMULATION OF REGULAR WAVES RUN-UP OVER SLOPPING BEACH BY OPEN FOAM Parviz Ghadimi 1*, Mohammad Ghandali 2, Mohammad Reza Ahmadi Balootaki 3 1*, 2, 3 Department of Marine Technology, Amirkabir

More information

Coupling micro-scale CFD simulations to meso-scale models

Coupling micro-scale CFD simulations to meso-scale models Coupling micro-scale CFD simulations to meso-scale models IB Fischer CFD+engineering GmbH Fabien Farella Michael Ehlen Achim Fischer Vortex Factoria de Càlculs SL Gil Lizcano Outline Introduction O.F.Wind

More information

Graduate Certificate Program in Energy Conversion & Transport Offered by the Department of Mechanical and Aerospace Engineering

Graduate Certificate Program in Energy Conversion & Transport Offered by the Department of Mechanical and Aerospace Engineering Graduate Certificate Program in Energy Conversion & Transport Offered by the Department of Mechanical and Aerospace Engineering Intended Audience: Main Campus Students Distance (online students) Both Purpose:

More information

The information in this report is provided in good faith and is believed to be correct, but the Met. Office can accept no responsibility for any

The information in this report is provided in good faith and is believed to be correct, but the Met. Office can accept no responsibility for any Virtual Met Mast Version 1 Methodology and Verification January 2010 The information in this report is provided in good faith and is believed to be correct, but the Met. Office can accept no responsibility

More information

The long-range WindScanner system how to synchronously intersect multiple laser beams

The long-range WindScanner system how to synchronously intersect multiple laser beams Downloaded from orbit.dtu.dk on: Oct 30, 2015 The long-range WindScanner system how to synchronously intersect multiple laser beams Vasiljevic, Nikola; Lea, Guillaume; Courtney, Michael; Mann, Jakob; Mikkelsen,

More information

Modeling and measurements at Østerild

Modeling and measurements at Østerild Wind Energy Department, Risø DTU, Roskilde, Denmark October 2010 Vattenfall, Fredericia, Denmark Outline Test station Østerild IEC standard Outline Test station Østerild IEC standard How much wood? Measurements

More information

North Sea wind climatology Part 1: a review of existing wind atlases

North Sea wind climatology Part 1: a review of existing wind atlases North Sea wind climatology Part 1: a review of existing wind atlases I.L. Wijnant, H.W. van den Brink and A. Stepek De Bilt, 2014 Technical report; TR-342 North Sea wind climatology Part 1: a review of

More information

Comparison of CFD models for multiphase flow evolution in bridge scour processes

Comparison of CFD models for multiphase flow evolution in bridge scour processes Comparison of CFD models for multiphase flow evolution in bridge scour processes A. Bayón-Barrachina, D. Valero, F.J. Vallès Morán, P. A. López-Jiménez Dept. of Hydraulic and Environmental Engineering

More information

Long-term Observations of the Convective Boundary Layer (CBL) and Shallow cumulus Clouds using Cloud Radar at the SGP ARM Climate Research Facility

Long-term Observations of the Convective Boundary Layer (CBL) and Shallow cumulus Clouds using Cloud Radar at the SGP ARM Climate Research Facility Long-term Observations of the Convective Boundary Layer (CBL) and Shallow cumulus Clouds using Cloud Radar at the SGP ARM Climate Research Facility Arunchandra S. Chandra Pavlos Kollias Department of Atmospheric

More information

The Influence of Aerodynamics on the Design of High-Performance Road Vehicles

The Influence of Aerodynamics on the Design of High-Performance Road Vehicles The Influence of Aerodynamics on the Design of High-Performance Road Vehicles Guido Buresti Department of Aerospace Engineering University of Pisa (Italy) 1 CONTENTS ELEMENTS OF AERODYNAMICS AERODYNAMICS

More information

NUMERICAL ANALYSIS OF THE EFFECTS OF WIND ON BUILDING STRUCTURES

NUMERICAL ANALYSIS OF THE EFFECTS OF WIND ON BUILDING STRUCTURES Vol. XX 2012 No. 4 28 34 J. ŠIMIČEK O. HUBOVÁ NUMERICAL ANALYSIS OF THE EFFECTS OF WIND ON BUILDING STRUCTURES Jozef ŠIMIČEK email: jozef.simicek@stuba.sk Research field: Statics and Dynamics Fluids mechanics

More information

Mark C. Kelly - DTU Orbit (22/09/2016) Kelly, Mark C.

Mark C. Kelly - DTU Orbit (22/09/2016) Kelly, Mark C. Mark C. Kelly - DTU Orbit (22/09/2016) Kelly, Mark C. mkel@dtu.dk Department of Wind Energy - Senior Researcher Resource Assessment Modelling Publications: A new k-epsilon model consistent with Monin-Obukhov

More information

Computational Modeling of Wind Turbines in OpenFOAM

Computational Modeling of Wind Turbines in OpenFOAM Computational Modeling of Wind Turbines in OpenFOAM Hamid Rahimi hamid.rahimi@uni-oldenburg.de ForWind - Center for Wind Energy Research Institute of Physics, University of Oldenburg, Germany Outline Computational

More information

Use of OpenFoam in a CFD analysis of a finger type slug catcher. Dynaflow Conference 2011 January 13 2011, Rotterdam, the Netherlands

Use of OpenFoam in a CFD analysis of a finger type slug catcher. Dynaflow Conference 2011 January 13 2011, Rotterdam, the Netherlands Use of OpenFoam in a CFD analysis of a finger type slug catcher Dynaflow Conference 2011 January 13 2011, Rotterdam, the Netherlands Agenda Project background Analytical analysis of two-phase flow regimes

More information

Research Objective 4: Develop improved parameterizations of boundary-layer clouds and turbulence for use in MMFs and GCRMs

Research Objective 4: Develop improved parameterizations of boundary-layer clouds and turbulence for use in MMFs and GCRMs Research Objective 4: Develop improved parameterizations of boundary-layer clouds and turbulence for use in MMFs and GCRMs Steve Krueger and Chin-Hoh Moeng CMMAP Site Review 31 May 2007 Scales of Atmospheric

More information

New LED Lighting in Display Cases at Rosenborg Castle

New LED Lighting in Display Cases at Rosenborg Castle Downloaded from orbit.dtu.dk on: Jun 18, 2016 New LED Lighting in Display Cases at Rosenborg Castle Dam-Hansen, Carsten Publication date: 2010 Document Version Publisher's PDF, also known as Version of

More information

Lecture 3. Turbulent fluxes and TKE budgets (Garratt, Ch 2)

Lecture 3. Turbulent fluxes and TKE budgets (Garratt, Ch 2) Lecture 3. Turbulent fluxes and TKE budgets (Garratt, Ch 2) In this lecture How does turbulence affect the ensemble-mean equations of fluid motion/transport? Force balance in a quasi-steady turbulent boundary

More information

Product Integration of Polymer Solar cells - from Circuitry to Functional Units

Product Integration of Polymer Solar cells - from Circuitry to Functional Units Downloaded from orbit.dtu.dk on: Jan 06, 2016 Product Integration of Polymer Solar cells - from Circuitry to Functional Units Krebs, Frederik C; Lauritzen, Hanne Publication date: 2011 Link to publication

More information

IC3 and IC4 Trains Under Risk of Blocking their Wheels

IC3 and IC4 Trains Under Risk of Blocking their Wheels Downloaded from orbit.dtu.dk on: Jan 08, 2016 IC3 and IC4 Trains Under Risk of Blocking their Wheels Stockmarr, Anders Publication date: 2015 Link to publication Citation (APA): Stockmarr, A. (2015). IC3

More information

New, Unique, and Dedicated dataset for the Global Atlas

New, Unique, and Dedicated dataset for the Global Atlas WFES 2014 EUDP Global Wind Atlas: New, Unique, and Dedicated dataset for the Global Atlas Presented by Jake Badger EUDP is a Danish fund for development and demonstration projects from the Danish Energy

More information

Wind resources map of Spain at mesoscale. Methodology and validation

Wind resources map of Spain at mesoscale. Methodology and validation Wind resources map of Spain at mesoscale. Methodology and validation Martín Gastón Edurne Pascal Laura Frías Ignacio Martí Uxue Irigoyen Elena Cantero Sergio Lozano Yolanda Loureiro e-mail:mgaston@cener.com

More information

TIMES demo models. Genikomsakis, Konstantinos N. ; Gargiulo, Maurizio ; Grohnheit, Poul Erik. Publication date: 2013. Link to publication

TIMES demo models. Genikomsakis, Konstantinos N. ; Gargiulo, Maurizio ; Grohnheit, Poul Erik. Publication date: 2013. Link to publication Downloaded from orbit.dtu.dk on: Oct 26, 2015 TIMES demo models Genikomsakis, Konstantinos N. ; Gargiulo, Maurizio ; Grohnheit, Poul Erik Publication date: 2013 Link to publication Citation (APA): Genikomsakis,

More information

Flow Loss in Screens: A Fresh Look at Old Correlation. Ramakumar Venkata Naga Bommisetty, Dhanvantri Shankarananda Joshi and Vighneswara Rao Kollati

Flow Loss in Screens: A Fresh Look at Old Correlation. Ramakumar Venkata Naga Bommisetty, Dhanvantri Shankarananda Joshi and Vighneswara Rao Kollati Journal of Mechanics Engineering and Automation 3 (013) 9-34 D DAVID PUBLISHING Ramakumar Venkata Naga Bommisetty, Dhanvantri Shankarananda Joshi and Vighneswara Rao Kollati Engineering Aerospace, MCOE,

More information

The GFS weather model

The GFS weather model The GFS weather model The Global Forecast System (GFS) is a numerical weather model of the National Weather Service and the National Oceanic and Atmospheric Administration (NOAA), USA. A numerical weather

More information

Simulation at Aeronautics Test Facilities A University Perspective Helen L. Reed, Ph.D., P.E. ASEB meeting, Irvine CA 15 October 2014 1500-1640

Simulation at Aeronautics Test Facilities A University Perspective Helen L. Reed, Ph.D., P.E. ASEB meeting, Irvine CA 15 October 2014 1500-1640 Simulation at Aeronautics Test A University Perspective Helen L. Reed, Ph.D., P.E. ASEB meeting, Irvine CA 15 October 2014 1500-1640 Questions How has the ability to do increasingly accurate modeling and

More information

Published in: Proceedings of 6th International Computer Engineering Conference (ICENCO)

Published in: Proceedings of 6th International Computer Engineering Conference (ICENCO) Aalborg Universitet Characterization and Modeling of Network Shawky, Ahmed Sherif Mahmoud; Bergheim, Hans ; Ragnarsson, Olafur ; Wranty, Andrzej ; Pedersen, Jens Myrup Published in: Proceedings of 6th

More information

EN 1991-1-4:2005. Wind actions

EN 1991-1-4:2005. Wind actions EN 1991 Eurocode 1: Actions on structures Your logo Brussels, 18-20 February 2008 Dissemination of information workshop 1 EN 1991-1-4:2005 Wind actions EN 1991-1-4:2005 Contents Brussels, 18-20 February

More information

PARK Energy Calculation

PARK Energy Calculation Function Calculation of the energy production of a wind farm including array losses and wind farm-induced turbulence. The PARK calculation is based on the following modules: METEO MODEL Calculation Method

More information

Stability and Cloud Development. Stability in the atmosphere AT350. Why did this cloud form, whereas the sky was clear 4 hours ago?

Stability and Cloud Development. Stability in the atmosphere AT350. Why did this cloud form, whereas the sky was clear 4 hours ago? Stability and Cloud Development AT350 Why did this cloud form, whereas the sky was clear 4 hours ago? Stability in the atmosphere An Initial Perturbation Stable Unstable Neutral If an air parcel is displaced

More information

HEAT TRANSFER ANALYSIS IN A 3D SQUARE CHANNEL LAMINAR FLOW WITH USING BAFFLES 1 Vikram Bishnoi

HEAT TRANSFER ANALYSIS IN A 3D SQUARE CHANNEL LAMINAR FLOW WITH USING BAFFLES 1 Vikram Bishnoi HEAT TRANSFER ANALYSIS IN A 3D SQUARE CHANNEL LAMINAR FLOW WITH USING BAFFLES 1 Vikram Bishnoi 2 Rajesh Dudi 1 Scholar and 2 Assistant Professor,Department of Mechanical Engineering, OITM, Hisar (Haryana)

More information

THE CFD SIMULATION OF THE FLOW AROUND THE AIRCRAFT USING OPENFOAM AND ANSA

THE CFD SIMULATION OF THE FLOW AROUND THE AIRCRAFT USING OPENFOAM AND ANSA THE CFD SIMULATION OF THE FLOW AROUND THE AIRCRAFT USING OPENFOAM AND ANSA Adam Kosík Evektor s.r.o., Czech Republic KEYWORDS CFD simulation, mesh generation, OpenFOAM, ANSA ABSTRACT In this paper we describe

More information

INTERNATIONAL JOURNAL OF MECHANICAL ENGINEERING AND TECHNOLOGY (IJMET)

INTERNATIONAL JOURNAL OF MECHANICAL ENGINEERING AND TECHNOLOGY (IJMET) INTERNATIONAL JOURNAL OF MECHANICAL ENGINEERING AND TECHNOLOGY (IJMET) Proceedings of the 2 nd International Conference on Current Trends in Engineering and Management ICCTEM -2014 ISSN 0976 6340 (Print)

More information

Aalborg Universitet. A cyclical model of social change (keynote) Wagoner, Brady. Published in: Conference for Social and Community Psychology

Aalborg Universitet. A cyclical model of social change (keynote) Wagoner, Brady. Published in: Conference for Social and Community Psychology Aalborg Universitet A cyclical model of social change (keynote) Wagoner, Brady Published in: Conference for Social and Community Psychology Publication date: 2013 Document Version Early version, also known

More information

Simple CFD Simulations and Visualisation using OpenFOAM and ParaView. Sachiko Arvelius, PhD

Simple CFD Simulations and Visualisation using OpenFOAM and ParaView. Sachiko Arvelius, PhD Simple CFD Simulations and Visualisation using OpenFOAM and ParaView Sachiko Arvelius, PhD Purpose of this presentation To show my competence in CFD (Computational Fluid Dynamics) simulation and visualisation

More information

Development of a Dainish infrastructure for spatial information (DAISI) Brande-Lavridsen, Hanne; Jensen, Bent Hulegaard

Development of a Dainish infrastructure for spatial information (DAISI) Brande-Lavridsen, Hanne; Jensen, Bent Hulegaard Aalborg Universitet Development of a Dainish infrastructure for spatial information (DAISI) Brande-Lavridsen, Hanne; Jensen, Bent Hulegaard Published in: NORDGI : Nordic Geographic Information Publication

More information

Application of Numerical Weather Prediction Models for Drought Monitoring. Gregor Gregorič Jožef Roškar Environmental Agency of Slovenia

Application of Numerical Weather Prediction Models for Drought Monitoring. Gregor Gregorič Jožef Roškar Environmental Agency of Slovenia Application of Numerical Weather Prediction Models for Drought Monitoring Gregor Gregorič Jožef Roškar Environmental Agency of Slovenia Contents 1. Introduction 2. Numerical Weather Prediction Models -

More information

An experimental and numerical study of microscale wind conditions in the Port of Rotterdam

An experimental and numerical study of microscale wind conditions in the Port of Rotterdam An experimental and numerical study of microscale wind conditions in the Port of Rotterdam WD Janssen 1, B Blocken 1 and HJ van Wijhe 2 1 Building Physics and Services, Eindhoven University of Technology,

More information

The Project Design Document

The Project Design Document Downloaded from orbit.dtu.dk on: Jan 06, 2016 The Project Design Document Olsen, Karen Holm Publication date: 2012 Link to publication Citation (APA): Olsen, K. H. (2012). The Project Design Document [Sound/Visual

More information

(1) 2 TEST SETUP. Table 1 Summary of models used for calculating roughness parameters Model Published z 0 / H d/h

(1) 2 TEST SETUP. Table 1 Summary of models used for calculating roughness parameters Model Published z 0 / H d/h Estimation of Surface Roughness using CFD Simulation Daniel Abdi a, Girma T. Bitsuamlak b a Research Assistant, Department of Civil and Environmental Engineering, FIU, Miami, FL, USA, dabdi001@fiu.edu

More information

Space charge build-up in XLPE-cable with temperature gradient

Space charge build-up in XLPE-cable with temperature gradient Downloaded from orbit.dtu.dk on: Dec 5, 205 Space charge build-up in XLPE-cable with temperature gradient Holbøll, Joachim; Henriksen, Mogens; Hjerrild, Jesper Published in: Proceeding of Annual Report

More information

Numerical Simulation of the External Flow Field. Around a Bluff Car*

Numerical Simulation of the External Flow Field. Around a Bluff Car* Numerical Simulation of the External Flow Field Around a Bluff Car* Sun Yongling, Wu Guangqiang, Xieshuo Automotive Engineering Department Shanghai Tongji University Shanghai, China E-mail: wuqjuhyk@online.sh.cn

More information

RESULTS OF ICARUS 9 EXPERIMENTS RUN AT IMRA EUROPE

RESULTS OF ICARUS 9 EXPERIMENTS RUN AT IMRA EUROPE Roulette, T., J. Roulette, and S. Pons. Results of ICARUS 9 Experiments Run at IMRA Europe. in Sixth International Conference on Cold Fusion, Progress in New Hydrogen Energy. 1996. Lake Toya, Hokkaido,

More information

MEL 807 Computational Heat Transfer (2-0-4) Dr. Prabal Talukdar Assistant Professor Department of Mechanical Engineering IIT Delhi

MEL 807 Computational Heat Transfer (2-0-4) Dr. Prabal Talukdar Assistant Professor Department of Mechanical Engineering IIT Delhi MEL 807 Computational Heat Transfer (2-0-4) Dr. Prabal Talukdar Assistant Professor Department of Mechanical Engineering IIT Delhi Time and Venue Course Coordinator: Dr. Prabal Talukdar Room No: III, 357

More information

Forest Experiments Ferhat Bingöl

Forest Experiments Ferhat Bingöl Forest Experiments Ferhat Bingöl f bi@ i dt dk febi@risoe.dtu.dk PostDoc Risø DTU 2009 Outlook Instruments Experiment Sites Models Results Conclusion Questions 2 Risø DTU, Technical University of Denmark

More information

CFD SIMULATION OF SDHW STORAGE TANK WITH AND WITHOUT HEATER

CFD SIMULATION OF SDHW STORAGE TANK WITH AND WITHOUT HEATER International Journal of Advancements in Research & Technology, Volume 1, Issue2, July-2012 1 CFD SIMULATION OF SDHW STORAGE TANK WITH AND WITHOUT HEATER ABSTRACT (1) Mr. Mainak Bhaumik M.E. (Thermal Engg.)

More information

A Response Surface Model to Predict Flammable Gas Cloud Volume in Offshore Modules. Tatiele Dalfior Ferreira Sávio Souza Venâncio Vianna

A Response Surface Model to Predict Flammable Gas Cloud Volume in Offshore Modules. Tatiele Dalfior Ferreira Sávio Souza Venâncio Vianna A Response Surface Model to Predict Flammable Gas Cloud Volume in Offshore Modules Tatiele Dalfior Ferreira Sávio Souza Venâncio Vianna PRESENTATION TOPICS Research Group Overview; Problem Description;

More information

Supporting document to NORSOK Standard C-004, Edition 2, May 2013, Section 5.4 Hot air flow

Supporting document to NORSOK Standard C-004, Edition 2, May 2013, Section 5.4 Hot air flow 1 of 9 Supporting document to NORSOK Standard C-004, Edition 2, May 2013, Section 5.4 Hot air flow A method utilizing Computational Fluid Dynamics (CFD) codes for determination of acceptable risk level

More information

Potential of Natural Ventilation in Shopping Centres Diederichsen, Alice; Friis, Kristina; Brohus, Henrik; Tranholm, Gitte T.

Potential of Natural Ventilation in Shopping Centres Diederichsen, Alice; Friis, Kristina; Brohus, Henrik; Tranholm, Gitte T. Aalborg Universitet Potential of Natural Ventilation in Shopping Centres Diederichsen, Alice; Friis, Kristina; Brohus, Henrik; Tranholm, Gitte T. Published in: Proceedings of Indoor Air 28 Publication

More information

Drivers of cycling demand and cycling futures in the Danish context.

Drivers of cycling demand and cycling futures in the Danish context. Downloaded from orbit.dtu.dk on: Dec 17, 2015 Drivers of cycling demand and cycling futures in the Danish context. Nielsen, Thomas Alexander Sick; Christiansen, Hjalmar; Jensen, Carsten; Skougaard, Britt

More information

Modelling the Marine Boundary Layer for Offshore Wind Power Utilisation

Modelling the Marine Boundary Layer for Offshore Wind Power Utilisation Modelling the Marine Boundary Layer for Offshore Wind Power Utilisation Vom Fachbereich Physik der Universität Oldenburg zur Erlangung des Grades eines Doktors der Naturwissenschaften (Dr. rer. nat.) angenommene

More information

Visualizing of Berkeley Earth, NASA GISS, and Hadley CRU averaging techniques

Visualizing of Berkeley Earth, NASA GISS, and Hadley CRU averaging techniques Visualizing of Berkeley Earth, NASA GISS, and Hadley CRU averaging techniques Robert Rohde Lead Scientist, Berkeley Earth Surface Temperature 1/15/2013 Abstract This document will provide a simple illustration

More information

Benchmarking of wind farm scale wake models in the EERA - DTOC project

Benchmarking of wind farm scale wake models in the EERA - DTOC project Downloaded from orbit.dtu.dk on: Feb 05, 2016 Benchmarking of wind farm scale wake models in the EERA - DTOC project Réthoré, Pierre-Elouan; Hansen, Kurt Schaldemose; Barthelmie, R.J.; Pryor, S.C.; Sieros,

More information

Action 9.2/Part II. Stijn Vranckx, Peter Vos VITO

Action 9.2/Part II. Stijn Vranckx, Peter Vos VITO Final report OpenFOAM CFD simulation of pollutant dispersion in street canyons: Validation and annual impact of trees Action 9.2/Part II Stijn Vranckx, Peter Vos VITO www.vmm.be www.vito.be Lisa Blyth

More information

WIND RESOURCE OF MICROREGIONS IN SOUTH AND NOTHEAST OF BRAZIL: AN EVALUATION OF METEROLOGICAL DATA AND COMPUTACIONAL TOOL

WIND RESOURCE OF MICROREGIONS IN SOUTH AND NOTHEAST OF BRAZIL: AN EVALUATION OF METEROLOGICAL DATA AND COMPUTACIONAL TOOL EWEA 211 - Europe s Premier Wind Energy Event 1-17 March 211, Brussels, Belgium WIN RESOURCE OF MICROREGIONS IN SOUTH AN NOTHEAST OF BRAZIL: AN EVALUATION OF METEROLOGICAL ATA AN COMPUTACIONAL TOOL Jorge

More information

Best Practice Guidelines for Mesoscale Wind Mapping Projects for the World Bank

Best Practice Guidelines for Mesoscale Wind Mapping Projects for the World Bank Best Practice Guidelines for Mesoscale Wind Mapping Projects for the World Bank October 2010 ESMAP The World Bank s Energy Sector Management Assistance Program 2 Table of Contents Introduction... 5 1 Mesoscale

More information

CHP from Updraft Gasifier and Stirling Engine

CHP from Updraft Gasifier and Stirling Engine Downloaded from orbit.dtu.dk on: Sep 16, 2016 CHP from Updraft Gasifier and Stirling Engine Jensen, N.; Werling, J.; Carlsen, Henrik; Henriksen, Ulrik Birk Published in: Proceedings of 12th European Biomass

More information

Hydrodynamic Loads on Two-Dimensional Sheets of Netting within the Range of Small Angels of Attack

Hydrodynamic Loads on Two-Dimensional Sheets of Netting within the Range of Small Angels of Attack Hydrodynamic Loads on Two-Dimensional Sheets of Netting within the Range of Small Angels of Attack by Mathias Paschen & Karsten Breddermann 10 th International Workshop Methods for the Development and

More information

Lecturer, Department of Engineering, ar45@le.ac.uk, Lecturer, Department of Mathematics, sjg50@le.ac.uk

Lecturer, Department of Engineering, ar45@le.ac.uk, Lecturer, Department of Mathematics, sjg50@le.ac.uk 39 th AIAA Fluid Dynamics Conference, San Antonio, Texas. A selective review of CFD transition models D. Di Pasquale, A. Rona *, S. J. Garrett Marie Curie EST Fellow, Engineering, ddp2@le.ac.uk * Lecturer,

More information

Some scientific challenges in aerodynamics for wind turbines

Some scientific challenges in aerodynamics for wind turbines Some scientific challenges in aerodynamics for wind turbines Christian Bak Senior Scientist Team Leader: Aerodynamics, aeroacoustics, airfoil and blade design Technical University of Denmark DTU Wind Energy

More information

Application of CFD Simulation in the Design of a Parabolic Winglet on NACA 2412

Application of CFD Simulation in the Design of a Parabolic Winglet on NACA 2412 , July 2-4, 2014, London, U.K. Application of CFD Simulation in the Design of a Parabolic Winglet on NACA 2412 Arvind Prabhakar, Ayush Ohri Abstract Winglets are angled extensions or vertical projections

More information

Near Real Time Blended Surface Winds

Near Real Time Blended Surface Winds Near Real Time Blended Surface Winds I. Summary To enhance the spatial and temporal resolutions of surface wind, the remotely sensed retrievals are blended to the operational ECMWF wind analyses over the

More information

The ADREA-HF CFD code An overview

The ADREA-HF CFD code An overview The ADREA-HF CFD code An overview Dr. A.G. Venetsanos Environmental Research Laboratory (EREL) National Centre for Scientific Research Demokritos, Greece venets@ipta.demokritos.gr Slide 2 Computational

More information

Head Loss in Pipe Flow ME 123: Mechanical Engineering Laboratory II: Fluids

Head Loss in Pipe Flow ME 123: Mechanical Engineering Laboratory II: Fluids Head Loss in Pipe Flow ME 123: Mechanical Engineering Laboratory II: Fluids Dr. J. M. Meyers Dr. D. G. Fletcher Dr. Y. Dubief 1. Introduction Last lab you investigated flow loss in a pipe due to the roughness

More information

Fluid Mechanics Prof. T. I. Eldho Department of Civil Engineering Indian Institute of Technology, Bombay. Lecture No. # 36 Pipe Flow Systems

Fluid Mechanics Prof. T. I. Eldho Department of Civil Engineering Indian Institute of Technology, Bombay. Lecture No. # 36 Pipe Flow Systems Fluid Mechanics Prof. T. I. Eldho Department of Civil Engineering Indian Institute of Technology, Bombay Lecture No. # 36 Pipe Flow Systems Welcome back to the video course on Fluid Mechanics. In today

More information

Description of zero-buoyancy entraining plume model

Description of zero-buoyancy entraining plume model Influence of entrainment on the thermal stratification in simulations of radiative-convective equilibrium Supplementary information Martin S. Singh & Paul A. O Gorman S1 CRM simulations Here we give more

More information

ME6130 An introduction to CFD 1-1

ME6130 An introduction to CFD 1-1 ME6130 An introduction to CFD 1-1 What is CFD? Computational fluid dynamics (CFD) is the science of predicting fluid flow, heat and mass transfer, chemical reactions, and related phenomena by solving numerically

More information

Validation Process for CFD Simulations of Wind Around Buildings

Validation Process for CFD Simulations of Wind Around Buildings Validation Process for CFD Simulations of Wind Around Buildings Prof. Sigrid REITER LEMA, University of Liège, Belgium ABSTRACT Our study is based on a great number of CFD (computational fluid dynamics)

More information

NUCLEAR ENERGY RESEARCH INITIATIVE

NUCLEAR ENERGY RESEARCH INITIATIVE NUCLEAR ENERGY RESEARCH INITIATIVE Experimental and CFD Analysis of Advanced Convective Cooling Systems PI: Victor M. Ugaz and Yassin A. Hassan, Texas Engineering Experiment Station Collaborators: None

More information

Danish Energy Policy and Renewable Energy

Danish Energy Policy and Renewable Energy Downloaded from orbit.dtu.dk on: Jul 7, 216 Danish Energy Policy and Renewable Energy Morthorst, Poul Erik Publication date: 21 Link to publication Citation (APA): Morthorst, P. E. (21). Danish Energy

More information

The Bolund Experiment: Overview and Background

The Bolund Experiment: Overview and Background Downloaded from orbit.dtu.dk on: Aug 21, 2016 The Bolund Experiment: Overview and Background Bechmann, Andreas; Berg, Jacob; Courtney, Michael; Ejsing Jørgensen, Hans; Mann, Jakob; Sørensen, Niels N. Publication

More information

Aeroelastic Investigation of the Sandia 100m Blade Using Computational Fluid Dynamics

Aeroelastic Investigation of the Sandia 100m Blade Using Computational Fluid Dynamics Aeroelastic Investigation of the Sandia 100m Blade Using Computational Fluid Dynamics David Corson Altair Engineering, Inc. Todd Griffith Sandia National Laboratories Tom Ashwill (Retired) Sandia National

More information

Eco Pelmet Modelling and Assessment. CFD Based Study. Report Number 610.14351-R1D1. 13 January 2015

Eco Pelmet Modelling and Assessment. CFD Based Study. Report Number 610.14351-R1D1. 13 January 2015 EcoPelmet Pty Ltd c/- Geoff Hesford Engineering 45 Market Street FREMANTLE WA 6160 Version: Page 2 PREPARED BY: ABN 29 001 584 612 2 Lincoln Street Lane Cove NSW 2066 Australia (PO Box 176 Lane Cove NSW

More information

Operational Mesoscale NWP at the Japan Meteorological Agency. Tabito HARA Numerical Prediction Division Japan Meteorological Agency

Operational Mesoscale NWP at the Japan Meteorological Agency. Tabito HARA Numerical Prediction Division Japan Meteorological Agency Operational Mesoscale NWP at the Japan Meteorological Agency Tabito HARA Numerical Prediction Division Japan Meteorological Agency NWP at JMA JMA has been operating two NWP models. GSM (Global Spectral

More information