CFD and wave and current induced loads on offshore wind turbines


 Liliana Brown
 2 years ago
 Views:
Transcription
1 CFD and wave and current induced loads on offshore wind turbines O. M. Faltinsen and M. Greco, CeSOS, NTNU SPH predictions by CNRInsean
2 Relevant offshore wind turbines Relevant hydrodynamic problems are similar as for other offshore structures
3 Problems of Practical Interest Slowlyvarying (Slowdrift) motions: Moored offshore platforms Resonance caused by secondorder wavebody interaction effects Wavedrift and viscous damping
4 Transient ringing response of monotowers and TLPs Springing of TLP Resonance caused by secondorder wavebody interaction effects in operating conditions Viscous damping Caused by 3rd and 4thorder wavebody interaction effects in survival conditions in deep water Ringing in shallow water due to plunging breaking waves Damping is secondary
5 Wetdeck slamming Wave run up and slamming Global and local effects
6 Accidental load: Breaking wave impact on platform column Experiments The resulting shear forces can cause structural failure of a concrete structure Steep and breaking deepwater waves. Scale 1:40 & 1:125 Correspond to extreme events in severe storms (H s =18m, T p =17s)
7 Breaking wave forces in shallow water Truss support structure for wind turbines on the ThorntonBank, Belgian Coast. Design by Reinertsen A/S. Truss structure in shallow water A. Chella
8 Mathieutype instability Damping is important Timedependent change of waterplane area shape and position Haslum Model test with scaled 202.5m draft Spar in 8.5m wave amplitude and 22.5s wave period Maximum response: Heave amplitude=20m Pitch amplitude=20 o Timedependent difference between centers of gravity and buoyancy
9 Vortex Induced Motions (VIM) and Vibrations (VIV)
10 Marine installation operations using a floating vessel/jackup Resonance and viscous damping Lin Li, T. Moan
11 Access to offshore wind turbines Minimize relative motion between ship and wind turbine support structure by automatic control Wave run up at the structure matters Use of highspeed Surface Effect Ship
12 Tools Experiments Analytical Solutions CFD Methods Approximate Computational Tools
13 Tools Complex models Complex geometries Visualization Global & local estimates Peric, CFD Workshop, Trondheim (2007) CFD Methods (NavierStokes solvers)  Reliability Costs
14 Survey by International Towing Tank Conference (ITTC) (2011) What are the difficulties and limitations of CFD to achieve wider use and acceptance to marine hydrodynamic problems? The accuracy of CFD is a main problem (Industries and universities) Grid generation is a major problem (Model basins) CFD Methods (NavierStokes solvers)
15 Main Features of a CFD Solver 1. Modelling 2. Discretization 3. Reliability analysis
16 1) Modelling Define the problem
17 Define the Problem Air Body Water Space: P Time : t Computational Domain,
18 1) Modelling Define the problem Define the fluid/flow properties
19 Define Fluid/Flow Properties Examples: Compressible or incompressible fluid? Air? Water
20 Compressibility is secondary for water, but may be important for air
21 Define Fluid/Flow Properties Examples: Viscous or inviscid fluid? Water?
22 Define Fluid/Flow Properties Examples: Laminar or turbulent flow? t 0 t 1 t 2 t 3? t 0 t 1 t 2 t 3 Path of a fluid particle in laminar flow Mean path of a fluid particle in turbulent flow
23 Turbulence Turbulence involves low spacetime scales. Proper modelling is still an open question. t 0 t 1 t 2 t 3 Mean path of a fluid particle
24 Viscous effects must be considered when flow separation occurs Occurs for structures with small crosssectional area Water
25 Turbulent flow is secondary with flow separation from sharp corners Water
26 1) Modelling Define the problem Define the fluid/flow properties Identify the variables of the problem
27 Identify the variables of the Problem  Assume no air pockets  Air irrelevant for water evolution  Incompressible fluid Pressures Integrated hydrodynamic loads Motions Body Water u, p Surrounding fluid Fluid point
28 1) Modelling Define the problem Define the fluid/flow properties Identify the variables of the problem Find the equations
29 Governing Equations They are given by fluid conservation properties: 1) Conservation of fluid mass 2) Conservation of fluid momentum NavierStokes equations
30 Governing Equations Conservation of fluid mass: (Incompressible Fluid) Volume = constant Zero net flux B
31 Initial Conditions  Unsteady problem Body (u, p) at t = 0 Water
32 Boundary Conditions Body Wetted hull Free surface Water Control surface
33 1) Modelling Remark Modelling implies assumptions and they may be wrong.
34 2) Discretization h : discretization size 1 h Body i Water N
35 CFD Scenarios Basic Assumptions Potential Flow Methods BEM, HPC Field Equations NavierStokes Methods Field Methods Interfaces Grid Methods (FVM/FDM/FEM) Forms of the Governing Eqs BoundaryFitted Grids Not Boundary Fitted Grids Lagrangian Gridless Methods Moving particles (SPH, MPS) Fixed Nodes (RKPM) Immersed in the Comput. Domain body modeled numerically Grid methods: inside body problem, body capturing.. Gridless methods: body force/particles, ghost particles.. Interface capturing (VOF, LS, MAC, CIP) Body Gasliquid Interface Domain Boundary body naturally tracked Interface tracking Eulerian Solution view point Eulerian Lagrangian
36 Potential Flow Methods Incompressible inviscid water with irrotational motion Equations with unknowns on the boundary Equations with unknowns in the domain Computational Domain Computational Domain Boundary Element Methods Field Methods
37 Potential Flow Methods Harmonic Polynomial Cell (HPC) method wave maker water surface Features: 2D sketch of the wave tank Water divided by cells Within each cell, the physical variables are expressed by harmonic polynomials; Benefits: Efficient (sparse matrix) Accurate (higher order) Easy to implement 3D wavebody interaction Yanlin Shao
38 Solution Point of View Lagrangian : The solution is found through moving grid/particles. u
39 Solution Point of View Eulerian : The solution is found at fixed locations.
40 Solution Point of View Eulerian : The solution is found at fixed locations. When Eulerian strategy is used for the field equations an additional technique is required to predict freesurface evolution
41 Strategies for FreeSurface Evolution Lagrangian strategy t 1 t 0 Eulerian strategy f j f i f j f i t 0 t 1
42 Freesurface Evolution VoF Method Hp: The quantity f is the fraction of water volume < 1 < 1 Free surface 1 1
43 Freesurface capturing methods (Level Set, VOF, Colour functions) Initial artificial change between water and air must remain small
44
45 CFD Scenarios Potential Flow Methods Hybrid Methods BEM, HPC Field Equations NavierStokes Methods Field Methods Interfaces Grid Methods (FVM/FDM/FEM) Fixed Grids BoundaryFitted Grids Eulerian Lagrangian Gridless Methods Meshless FEM Particle Methods (SPH, MPS) Time evolution Higherorder methods Immersed in the Comput. Domain body modeled numerically Grid methods: inside body problem, body capturing.. Gridless methods: body force/particles, ghost particles.. Eulerian: interface capturing (VOF, LS, MAC, CIP) Body AirWater Interface Explicit SemiImplicit Implicit Domain Boundary body naturally tracked Lagrangian : interface tracking
46 Hybrid method Vortex shedding causes damping of resonant motions Coupled potential flow (linear) and local viscous solutions with flow separation with significant reduction of computational speed
47 Hybrid method Linear or weakly nonlinear potentialflow solver Efficiency Accuracy NavierStokes solver Breaking Fragmentation Air entrainment Viscosity
48 CFD and CeSOS BEM (Boundary Element Method) HPC (Harmonic Polynomial Cell) SPH (Smoothed Particle Hydrodynamics) FDM (Finite Difference Method)+Level Set CIP(Constrained Interpolation Profile): FDM with CIP used during advection step. Combined with colour functions OpenFoam (FVM+VOF) MaxwellBoltzmann method and use of GPU Hybrid methods for locally separated flow (HPC,FVM) Hybrid methods for green water on deck
49 Reliability Analysis 1) Verification: Solving the equations right? The check of 1) means comparing with other benchmark numerical tests and analytical solutions using the same model. 2) Validation: Solving the right equations? The check of 2) means comparing with model tests. Experiments have also errors Error analysis is needed in both experiments and computations
50 Is this correct?
51 Frame Jan 2013 contour lines Numerical wave tank wave maker water surface Wave beach Numerical damping can cause too quick decay of waves on a coarse grid Numerical dispersion can cause too large error in the dispersion relation between wave length and wave speed
52 Wave focusing due to uneven seafloor Frame May d contour Water surface Y Z X Sea floor HPC results agree well with experiments
53 Verification and validation of ringing loads Comparisons with numerical (Ferrant) and experimental (Huseby&Grue) results Linear Force Analytical Experiment Present Ferrant Wave slope ka Sum Frequency Force Analytical Experiment Present Ferrant Wave slope ka Triple Frequency Force Analytical Experiment Present Ferrant Wave slope ka Quadruple Frequency Force Experiment Ferrant Present Wave 0.25 ka slope Timedomain nonlinear wave forces on a cylinder with exact freesurface conditions by the HPC method Yanlin Shao
54 Ringing of monotower in survival condition Steep local waves propagating on the two sides of the cylinder The waves start on the upstream hull side when there is a wave trough
55 Ringing of monotower in survival condition The two steep propagating waves will later collide Big splash
56 Water entry of circular cylinders Relevant for impact loads on vertical cylinders due to steep waves Wienke&Oumeraci
57 Nonviscous flow separation on a curved surface by BEM t = 0.315s t = 0.390s t = 0.500s t = 0.410s
58 Convergence studies for water entry of circular cylinder with commercial CFD code based on FVM and VOF The effect of the time step size dt on the slamming force coefficient C F / Experiments: C = 5.15 / ( Vt / R) V t / R S S 3 RV 2 C S Neither the force nor the force impulse converge CIP code developments at CeSOS: X. Zhu : Converged force impulse T. Vestbøstad: Satisfactory force Vt R
59 Verification and validation of numerical predictions of local slamming Temarel (2009) Viscous effects can be neglected and potential flow assumed Simple case Difficult benchmark tests: Small local deadrise angles Ventilation Experimental errors (bias and precision errors) Bias examples: 3D flow, oscillatory rig motions, elastic rope forces
60 p p 0.5 V 0 2 Difficult benchmark test Water entry of wedge with deadrise angle 7.5 degrees and constant velocity V Slamming predictions by commercial code (FVM+VOF) Commercial code Human errors? Similarity solution BEM Composite Wagner solution Polynomial fit of average commercial code results z Vt
61 Summary There exists a broad variety of CFD methods Computational time is of concern for wave and current induced loads Physical simplifications by potential flow and hybrid methods reduce computational time Reliability of CFD results All physical problems such as turbulence is not fully understood Convergence Verification and validation
62 Some Useful CFD References Brebbia C. A. many books on Boundary Elements, WIT Press. Ferziger J.H., Peric M. Computational methods for fluid dynamics, Springer. Faltinsen, O. M., Timokha, A. (2009) Sloshing, Chapter 10, Cambridge University Press. Hirt C.W., Nichols B.D. (1988)"VolumeofFluid(VOF)MethodfortheDynamicsof Free Boundaries," J. of Comput. Phys., 39, 201, Johnson C. Numerical Solution of Partial Differential Equations by the Finite Element Method, Cambridge. Monaghan J.J. (1994) "Simulating free surface flows with SPH", J. Comp. Physics, 110, Sussman M., Smereka P., Osher S. (1994) A level set method for computing solutions to imcompressible twophase flow, J. Comput. Phys, 119, Unverdi S.O., Tryggvason G. (1992) "A Front Tracking Method for Viscous Incompressible Flows, J. of Comput.Phys., 100, Yabe T., Ogata Y., Takizawa K., Kawai T., Segawa A., Sakurai K. (2002) The next generation CIP as a conservative semilagrangian solver for solid, liquid, and gas, J. Comput. Appl. Math., 149,
NUMERICAL SIMULATION OF REGULAR WAVES RUNUP OVER SLOPPING BEACH BY OPEN FOAM
NUMERICAL SIMULATION OF REGULAR WAVES RUNUP 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 informationA Cost Effective Computational Tool for Offshore Floater Design
Introduction A Cost Effective Computational Tool for Offshore Floater Design Jang Whan Kim, Hyunchul Jang & Jim O Sullivan Technip Offshore floating platforms are complex engineering systems with numerous
More informationExperimental and numerical investigation of slamming of an Oscillating Wave Surge Converter in two dimensions
Experimental and numerical investigation of slamming of an Oscillating Wave Surge Converter in two dimensions T. Abadie, Y. Wei, V. Lebrun, F. Dias (UCD) Collaborating work with: A. Henry, J. Nicholson,
More informationLecture 16  Free Surface Flows. Applied Computational Fluid Dynamics
Lecture 16  Free Surface Flows Applied Computational Fluid Dynamics Instructor: André Bakker http://www.bakker.org André Bakker (20022006) Fluent Inc. (2002) 1 Example: spinning bowl Example: flow in
More informationUse 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 twophase flow regimes
More informationME6130 An introduction to CFD 11
ME6130 An introduction to CFD 11 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 informationApplication of STARCCM+ in Marine and OffShore Engineering: StateoftheArt and New Developments. M. Perić, F. Schäfer, E. Schreck, J.
Application of STARCCM+ in Marine and OffShore Engineering: StateoftheArt and New Developments M. Perić, F. Schäfer, E. Schreck, J. Singh Contents Main features of STARCCM+ relevant for marine and
More informationExpress Introductory Training in ANSYS Fluent Lecture 1 Introduction to the CFD Methodology
Express Introductory Training in ANSYS Fluent Lecture 1 Introduction to the CFD Methodology Dimitrios Sofialidis Technical Manager, SimTec Ltd. Mechanical Engineer, PhD PRACE Autumn School 2013  Industry
More informationAbaqus/CFD Sample Problems. Abaqus 6.10
Abaqus/CFD Sample Problems Abaqus 6.10 Contents 1. Oscillatory Laminar Plane Poiseuille Flow 2. Flow in Shear Driven Cavities 3. Buoyancy Driven Flow in Cavities 4. Turbulent Flow in a Rectangular Channel
More informationCurrent Induced Loads and Motions of Offshore Structures
CURRENT AFFAIRS JIP, Project Plan V2.0 MARIN project 21004 Current Induced Loads and Motions of Offshore Structures Research Partners: Objective: 'To develop tools and guidelines to assist engineers in
More informationComputational Fluid Dynamics (CFD) and Multiphase Flow Modelling. Associate Professor Britt M. Halvorsen (Dr. Ing) Amaranath S.
Computational Fluid Dynamics (CFD) and Multiphase Flow Modelling Associate Professor Britt M. Halvorsen (Dr. Ing) Amaranath S. Kumara (PhD Student), PO. Box 203, N3901, N Porsgrunn, Norway What is CFD?
More informationSimple 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 informationApplication of a TightlyCoupled CFD/6DOF Solver For Simulating Offshore Wind Turbine Platforms
Application of a TightlyCoupled CFD/6DOF Solver For Simulating Offshore Wind Turbine Platforms Alexander J. Dunbar 1, Brent A. Craven 1, Eric G. Paterson 2, and James G. Brasseur 1 1 Penn State University;
More informationLecture 6  Boundary Conditions. Applied Computational Fluid Dynamics
Lecture 6  Boundary Conditions Applied Computational Fluid Dynamics Instructor: André Bakker http://www.bakker.org André Bakker (20022006) Fluent Inc. (2002) 1 Outline Overview. Inlet and outlet boundaries.
More informationNumerical Wave Generation In OpenFOAM R
Numerical Wave Generation In OpenFOAM R Master of Science Thesis MOSTAFA AMINI AFSHAR Department of Shipping and Marine Technology CHALMERS UNIVERSITY OF TECHNOLOGY Göteborg, Sweden, 2010 Report No. X10/252
More informationTWODIMENSIONAL FINITE ELEMENT ANALYSIS OF FORCED CONVECTION FLOW AND HEAT TRANSFER IN A LAMINAR CHANNEL FLOW
TWODIMENSIONAL FINITE ELEMENT ANALYSIS OF FORCED CONVECTION FLOW AND HEAT TRANSFER IN A LAMINAR CHANNEL FLOW Rajesh Khatri 1, 1 M.Tech Scholar, Department of Mechanical Engineering, S.A.T.I., vidisha
More informationSimulation of Offshore Structures in Virtual Ocean Basin (VOB)
Simulation of Offshore Structures in Virtual Ocean Basin (VOB) Dr. Wei Bai 29/06/2015 Department of Civil & Environmental Engineering National University of Singapore Outline Methodology Generation of
More informationOVERSET GRID CFD APPLICATIONS FOR CHALLENGING HYDRODYNAMIC PROBLEMS
OVERSET GRID CFD APPLICATIONS FOR CHALLENGING HYDRODYNAMIC PROBLEMS OFFSHORE HamnChing Chen 1, SingKwan Lee 2 and Ah Kuan Seah 3 1 Zachry Department of Civil Engineering, Texas A&M University, College
More informationPart IV. Conclusions
Part IV Conclusions 189 Chapter 9 Conclusions and Future Work CFD studies of premixed laminar and turbulent combustion dynamics have been conducted. These studies were aimed at explaining physical phenomena
More informationUsing Computational Fluid Dynamics (CFD) Simulation to Model Fluid Motion in Process Vessels on Fixed and Floating Platforms
Using Computational Fluid Dynamics (CFD) Simulation to Model Fluid Motion in Process Vessels on Fixed and Floating Platforms Dr. Ted Frankiewicz Dr. ChangMing Lee NATCO Group Houston, TX USA IBC 9 th
More informationMEL 807 Computational Heat Transfer (204) Dr. Prabal Talukdar Assistant Professor Department of Mechanical Engineering IIT Delhi
MEL 807 Computational Heat Transfer (204) Dr. Prabal Talukdar Assistant Professor Department of Mechanical Engineering IIT Delhi Time and Venue Course Coordinator: Dr. Prabal Talukdar Room No: III, 357
More informationModel of a flow in intersecting microchannels. Denis Semyonov
Model of a flow in intersecting microchannels Denis Semyonov LUT 2012 Content Objectives Motivation Model implementation Simulation Results Conclusion Objectives A flow and a reaction model is required
More informationChapter 1. Governing Equations of Fluid Flow and Heat Transfer
Chapter 1 Governing Equations of Fluid Flow and Heat Transfer Following fundamental laws can be used to derive governing differential equations that are solved in a Computational Fluid Dynamics (CFD) study
More informationScienceDirect. Pressure Based Eulerian Approach for Investigation of Sloshing in Rectangular Water Tank
Available online at www.sciencedirect.com ScienceDirect Procedia Engineering 144 (2016 ) 1187 1194 12th International Conference on Vibration Problems, ICOVP 2015 Pressure Based Eulerian Approach for Investigation
More informationUSING SMOOTHED PARTICLE HYDRODYNAMICS TO STUDY WAVE IMPACT ON FLOATING OFFSHORE PLATFORMS: THE EFFECT OF MOORING SYSTEM
Seventh International Conference on CFD in the Minerals and Process Industries CSIRO, Melbourne, Australia 911 December 2009 USING SMOOTHED PARTICLE HYDRODYNAMICS TO STUDY WAVE IMPACT ON FLOATING OFFSHORE
More informationESSENTIAL 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 informationChapter 2. Derivation of the Equations of Open Channel Flow. 2.1 General Considerations
Chapter 2. Derivation of the Equations of Open Channel Flow 2.1 General Considerations Of interest is water flowing in a channel with a free surface, which is usually referred to as open channel flow.
More informationIntroduction to CFD Analysis
Introduction to CFD Analysis 21 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 informationNUMERICAL 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 informationOpenFOAM Optimization Tools
OpenFOAM Optimization Tools Henrik Rusche and Aleks Jemcov h.rusche@wikkigmbh.de and a.jemcov@wikki.co.uk Wikki, Germany and United Kingdom OpenFOAM Optimization Tools p. 1 Agenda Objective Review optimisation
More informationTHE 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 informationFLOODING AND DRYING IN DISCONTINUOUS GALERKIN DISCRETIZATIONS OF SHALLOW WATER EQUATIONS
European Conference on Computational Fluid Dynamics ECCOMAS CFD 26 P. Wesseling, E. Oñate and J. Périaux (Eds) c TU Delft, The Netherlands, 26 FLOODING AND DRING IN DISCONTINUOUS GALERKIN DISCRETIZATIONS
More informationDifferential Relations for Fluid Flow. Acceleration field of a fluid. The differential equation of mass conservation
Differential Relations for Fluid Flow In this approach, we apply our four basic conservation laws to an infinitesimally small control volume. The differential approach provides point by point details of
More informationHydrOcean, your numerical hydrodynamic partner
HydrOcean, your numerical hydrodynamic partner Contact: Luke Berry, Account Manager Luke.berry@hydrocean.fr Tel: +33 (0)2 40 20 60 94 Who We Are Overview Founded in 2007 by E. Jacquin Spinoff from Ecole
More informationCustomer Training Material. Lecture 2. Introduction to. Methodology ANSYS FLUENT. ANSYS, Inc. Proprietary 2010 ANSYS, Inc. All rights reserved.
Lecture 2 Introduction to CFD Methodology Introduction to ANSYS FLUENT L21 What is CFD? Computational Fluid Dynamics (CFD) is the science of predicting fluid flow, heat and mass transfer, chemical reactions,
More informationCommercial CFD Software Modelling
Commercial CFD Software Modelling Dr. Nor Azwadi bin Che Sidik Faculty of Mechanical Engineering Universiti Teknologi Malaysia INSPIRING CREATIVE AND INNOVATIVE MINDS 1 CFD Modeling CFD modeling can be
More informationCFD Based Air Flow and Contamination Modeling of Subway Stations
CFD Based Air Flow and Contamination Modeling of Subway Stations Greg Byrne Center for Nonlinear Science, Georgia Institute of Technology Fernando Camelli Center for Computational Fluid Dynamics, George
More informationA. Ricci, E. Giuri. Materials and Microsystems Laboratory
Presented at the COMSOL Conference 2009 Milan FSI Analysis of Microcantilevers Vibrating in Fluid Environment Materials and Microsystems Laboratory Politecnico di Torino Outline Brief Presentation of Materials
More informationThis chapter describes how you can model solidification and melting in FLUENT. Information is organized into the following sections:
Chapter 21. Melting Modeling Solidification and This chapter describes how you can model solidification and melting in FLUENT. Information is organized into the following sections: Section 21.1: Overview
More informationAdaptation and validation of OpenFOAM CFDsolvers for nuclear safety related flow simulations
Adaptation and validation of OpenFOAM CFDsolvers for nuclear safety related flow simulations SAFIR2010 Seminar, 10.11.3.2011, Espoo Juho Peltola, Timo Pättikangas (VTT) Tomas Brockmann, Timo Siikonen
More informationComparison of CFD models for multiphase flow evolution in bridge scour processes
Comparison of CFD models for multiphase flow evolution in bridge scour processes A. BayónBarrachina, D. Valero, F.J. Vallès Morán, P. A. LópezJiménez Dept. of Hydraulic and Environmental Engineering
More informationContents. Microfluidics  Jens Ducrée Physics: NavierStokes Equation 1
Contents 1. Introduction 2. Fluids 3. Physics of Microfluidic Systems 4. Microfabrication Technologies 5. Flow Control 6. Micropumps 7. Sensors 8. InkJet Technology 9. Liquid Handling 10.Microarrays 11.Microreactors
More informationStress and deformation of offshore piles under structural and wave loading
Stress and deformation of offshore piles under structural and wave loading J. A. Eicher, H. Guan, and D. S. Jeng # School of Engineering, Griffith University, Gold Coast Campus, PMB 50 Gold Coast Mail
More informationDistinguished Professor George Washington University. Graw Hill
Mechanics of Fluids Fourth Edition Irving H. Shames Distinguished Professor George Washington University Graw Hill Boston Burr Ridge, IL Dubuque, IA Madison, Wl New York San Francisco St. Louis Bangkok
More informationSimplified formulas of heave added mass coefficients at high frequency for various twodimensional bodies in a finite water depth
csnak, 2015 Int. J. Nav. Archit. Ocean Eng. (2015) 7:115~127 http://dx.doi.org/10.1515/ijnaoe20150009 pissn: 20926782, eissn: 20926790 Simplified formulas of heave added mass coefficients at high frequency
More informationOverset Grids Technology in STARCCM+: Methodology and Applications
Overset Grids Technology in STARCCM+: Methodology and Applications Eberhard Schreck, Milovan Perić and Deryl Snyder eberhard.schreck@cdadapco.com milovan.peric@cdadapco.com deryl.snyder@cdadapco.com
More informationANSYS Applications in Ocean Science and Engineering
ANSYS Applications in Ocean Science and Engineering 1 Marsall Loewenstein Ian Lockley 8/10/2011 Perspective The Universe in One Year concept was inspired by the late Cornell astronomer, Carl Sagan. Sagan
More informationCoupled CFD and Vortex Methods for Modelling Hydro and Aerodynamics of Tidal Current Turbines and On and Offshore Wind Turbines
Coupled CFD and Vortex Methods for Modelling Hydro and Aerodynamics of Tidal Current Turbines and On and Offshore Wind Turbines SIMPACK User Meeting 2014 Augsburg, Germany October 9 th, 2014 Dipl.Ing.
More informationA study of wave forces on offshore platform by direct CFD and Morison equation
A study of wave forces on offshore platform by direct CFD and Morison equation D. Zhang 1 E. G. Paterson 2 Aerospace and Ocean Engineering Virginia Polytechnic Institute and State University 1 liybzd@vt.edu
More informationIntroduction to CFD Analysis
Introduction to CFD Analysis Introductory FLUENT Training 2006 ANSYS, Inc. All rights reserved. 2006 ANSYS, Inc. All rights reserved. 22 What is CFD? Computational fluid dynamics (CFD) is the science
More informationMaterials: Droz, Chopard (book) FHP paper (print)
Materials: Droz, Chopard (book) FHP paper (print) Computer simulations of fluid dynamics Lecture 2: HPP, FHP Models Maciej Matyka Announcement Today's class: 12:15, 518 ***be there*** FHP model (cellular
More informationA moving piston boundary condition including gap flow in OpenFOAM
A piston boundary condition including gap flow in OpenFOAM CLEMENS FRIES Johannes Kepler University IMH Altenbergerstrasse 69, 44 Linz AUSTRIA clemens.fries@jku.at BERNHARD MANHARTSGRUBER Johannes Kepler
More informationINTRODUCTION TO FLUID MECHANICS
INTRODUCTION TO FLUID MECHANICS SIXTH EDITION ROBERT W. FOX Purdue University ALAN T. MCDONALD Purdue University PHILIP J. PRITCHARD Manhattan College JOHN WILEY & SONS, INC. CONTENTS CHAPTER 1 INTRODUCTION
More informationNUMERICAL INVESTIGATIONS ON HEAT TRANSFER IN FALLING FILMS AROUND TURBULENCE WIRES
NUMERICAL INVESTIGATIONS ON HEAT TRANSFER IN FALLING FILMS AROUND TURBULENCE WIRES Abstract H. Raach and S. Somasundaram Thermal Process Engineering, University of Paderborn, Paderborn, Germany Turbulence
More informationCFD modelling of floating body response to regular waves
CFD modelling of floating body response to regular waves Dr Yann Delauré School of Mechanical and Manufacturing Engineering Dublin City University Ocean Energy Workshop NUI Maynooth, October 21, 2010 Table
More informationMODULE VII LARGE BODY WAVE DIFFRACTION
MODULE VII LARGE BODY WAVE DIFFRACTION 1.0 INTRODUCTION In the wavestructure interaction problems, it is classical to divide into two major classification: slender body interaction and large body interaction.
More informationCFD Simulation of Flow Induced Motions of a Multi Column Floating Platform
CFD Simulation of Flow Induced Motions of a Multi Column Floating Platform Recent improvements in capabilities of both hardware and software allow solving the coupled rigid body motions for the floating
More informationHPC Deployment of OpenFOAM in an Industrial Setting
HPC Deployment of OpenFOAM in an Industrial Setting Hrvoje Jasak h.jasak@wikki.co.uk Wikki Ltd, United Kingdom PRACE Seminar: Industrial Usage of HPC Stockholm, Sweden, 2829 March 2011 HPC Deployment
More informationFluid structure interaction of a vibrating circular plate in a bounded fluid volume: simulation and experiment
Fluid Structure Interaction VI 3 Fluid structure interaction of a vibrating circular plate in a bounded fluid volume: simulation and experiment J. Hengstler & J. Dual Department of Mechanical and Process
More informationNumerical Modelling of Regular Waves Propagation and Breaking Using Waves2Foam
Journal of Clean Energy Technologies, Vol. 3, No. 4, July 05 Numerical Modelling of Regular Waves Propagation and Breaking Using WavesFoam B. Chenari, S. S. Saadatian, and Almerindo D. Ferreira numerical
More informationE. Marino 1, C. Lugni 2, G. Stabile 1, C. Borri 1
Proceedings of the 9th International Conference on Structural Dynamics, EURODYN Porto, Portugal, June  July A. Cunha, E. Caetano, P. Ribeiro, G. Müller (eds.) ISSN: 9; ISBN: 9797755 Coupled dynamic
More informationCFD Case Studies in Marine and Offshore Engineering
CFD Case Studies in Marine and Offshore Engineering Milovan Perić CDadapco, Nürnberg Office www.cdadapco.com Milovan.Peric@de.cdadapco.com Introduction CDadapco software: a brief overview Case studies
More informationFundamentals of Fluid Mechanics
Sixth Edition. Fundamentals of Fluid Mechanics International Student Version BRUCE R. MUNSON DONALD F. YOUNG Department of Aerospace Engineering and Engineering Mechanics THEODORE H. OKIISHI Department
More informationLaminar Flow in a Baffled Stirred Mixer
Laminar Flow in a Baffled Stirred Mixer Introduction This exercise exemplifies the use of the rotating machinery feature in the CFD Module. The Rotating Machinery interface allows you to model moving rotating
More informationABS TECHNICAL PAPERS 2008 A STERN SLAMMING ANALYSIS USING THREEDIMENSIONAL CFD SIMULATION. Suqin Wang Email: SWang@eagle.org
ABS TECHNICAL PAPERS 8 Proceedings of OMAE 8 7 th International Conference on Offshore Mechanics and Arctic Engineering 15 June, 8, Estoril, Portugal OMAE85785 A STERN SLAMMING ANALYSIS USING THREEDIMENSIONAL
More informationCFD Simulation of Subcooled Flow Boiling using OpenFOAM
Research Article International Journal of Current Engineering and Technology EISSN 2277 4106, PISSN 23475161 2014 INPRESSCO, All Rights Reserved Available at http://inpressco.com/category/ijcet CFD
More informationCFD Analysis of Sloshing Within Tank
Roshan Ambade 1, Rajesh Kale 2 P.G. Student, Department of Mechanical Engineering, RGIT, Mumbai, India 1 Associate Professor, Department of Mechanical Engineering, RGIT, Mumbai, India 2 Abstract Tanker
More informationOverview. also give you an idea of ANSYS capabilities. In this chapter, we will define Finite Element Analysis and. Topics covered: B.
2. FEA and ANSYS FEA and ANSYS Overview In this chapter, we will define Finite Element Analysis and also give you an idea of ANSYS capabilities. Topics covered: A. What is FEA? B. About ANSYS FEA and ANSYS
More informationFrequently Asked Questions about the Finite Element Method
Frequently Asked Questions about the Finite Element Method 1. What is the finite element method (FEM)? The FEM is a novel numerical method used to solve ordinary and partial differential equations. The
More informationCFD SUPPORTED EXAMINATION OF BUOY DESIGN FOR WAVE ENERGY CONVERSION
CFD SUPPORTED EXAMINATION OF BUOY DESIGN FOR WAVE ENERGY CONVERSION Nadir Yilmaz, Geoffrey E. Trapp, Scott M. Gagan, Timothy R. Emmerich Department of Mechanical Engineering, New Mexico Institute of Mining
More informationMathematical Modeling and Engineering Problem Solving
Mathematical Modeling and Engineering Problem Solving Berlin Chen Department of Computer Science & Information Engineering National Taiwan Normal University Reference: 1. Applied Numerical Methods with
More informationOpenFOAM Opensource and CFD
OpenFOAM Opensource and CFD Andrew King Department of Mechanical Engineering Curtin University Outline What is Opensource Software OpenFOAM Overview Utilities, Libraries and Solvers Data Formats The CFD
More informationExtension of the OpenFOAM CFD tool set for modelling multiphase flow
Extension of the OpenFOAM CFD tool set for modelling multiphase flow Ridhwaan Suliman Johan Heyns Oliver Oxtoby Advanced Computational Methods Research Group, CSIR South Africa CHPC National Meeting, Durban,
More informationWavePiston Project. Structural Concept Development Hydrodynamic Aspects. Preliminary Analytical Estimates. February 2010
WavePiston Project Structural Concept Development Hydrodynamic Aspects Preliminary Analytical Estimates February 2010 WavePiston Project Structural Concept Development Hydrodynamic Aspects Preliminary
More informationPart II: Finite Difference/Volume Discretisation for CFD
Part II: Finite Difference/Volume Discretisation for CFD Finite Volume Metod of te AdvectionDiffusion Equation A Finite Difference/Volume Metod for te Incompressible NavierStokes Equations MarkerandCell
More informationFLUID MECHANICS IM0235 DIFFERENTIAL EQUATIONS  CB0235 2014_1
COURSE CODE INTENSITY PREREQUISITE COREQUISITE CREDITS ACTUALIZATION DATE FLUID MECHANICS IM0235 3 LECTURE HOURS PER WEEK 48 HOURS CLASSROOM ON 16 WEEKS, 32 HOURS LABORATORY, 112 HOURS OF INDEPENDENT
More informationAeroacoustic Analogy for the Computation of Aeroacoustic Fields in Partially Closed Domains
INSTITUT FÜR MECHANIK UND MECHATRONIK Messtechnik und Aktorik Aeroacoustic Analogy for the Computation of Aeroacoustic Fields in Partially Closed Domains A. Hüppe 1, M. Kaltenbacher 1, A. Reppenhagen 2,
More informationContents. Microfluidics  Jens Ducrée Physics: Fluid Dynamics 1
Contents 1. Introduction 2. Fluids 3. Physics of Microfluidic Systems 4. Microfabrication Technologies 5. Flow Control 6. Micropumps 7. Sensors 8. InkJet Technology 9. Liquid Handling 10.Microarrays 11.Microreactors
More informationHydrodynamics of stellar explosions
Some basic hydrodynamics The art of CFD Hydrodynamic challenges in stellar explosions Hydrodynamics of stellar explosions General: Literature L.D.Landau & E.M.Lifshitz, Fluid Mechanics, Pergamon (1959)
More informationLecture 11 Boundary Layers and Separation. Applied Computational Fluid Dynamics
Lecture 11 Boundary Layers and Separation Applied Computational Fluid Dynamics Instructor: André Bakker http://www.bakker.org André Bakker (20022006) Fluent Inc. (2002) 1 Overview Drag. The boundarylayer
More informationCFD IN CONCEPTUAL SHIP DESIGN
2011 MASTER S THESIS CFD IN CONCEPTUAL SHIP DESIGN MSc in Marine Technology Stud. Techn. Petter Olav Vangbo i ii Master s Thesis in Marine Systems Design Stud. Techn. Petter Vangbo CFD in conceptual ship
More informationO.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 informationIntroduction to Computational Fluid Dynamics
Introduction to Computational Fluid Dynamics Instructor: Dmitri Kuzmin Institute of Applied Mathematics University of Dortmund kuzmin@math.unidortmund.de http://www.featflow.de Fluid (gas and liquid)
More informationDynamic Process Modeling. Process Dynamics and Control
Dynamic Process Modeling Process Dynamics and Control 1 Description of process dynamics Classes of models What do we need for control? Modeling for control Mechanical Systems Modeling Electrical circuits
More informationAn Introduction to Hydrocode Modeling. Gareth S. Collins
An Introduction to Hydrocode Modeling Gareth S. Collins August 2, 2002 1 Introduction The hydrocode is a computational tool for modeling the behavior of continuous media. In its purest sense, a hydrocode
More informationIntroduction to CFD Basics
Introduction to CFD Basics Rajesh Bhaskaran Lance Collins This is a quickanddirty introduction to the basic concepts underlying CFD. The concepts are illustrated by applying them to simple 1D model problems.
More informationComputational Modeling of Wind Turbines in OpenFOAM
Computational Modeling of Wind Turbines in OpenFOAM Hamid Rahimi hamid.rahimi@unioldenburg.de ForWind  Center for Wind Energy Research Institute of Physics, University of Oldenburg, Germany Outline Computational
More informationAN EFFECT OF GRID QUALITY ON THE RESULTS OF NUMERICAL SIMULATIONS OF THE FLUID FLOW FIELD IN AN AGITATED VESSEL
14 th European Conference on Mixing Warszawa, 1013 September 2012 AN EFFECT OF GRID QUALITY ON THE RESULTS OF NUMERICAL SIMULATIONS OF THE FLUID FLOW FIELD IN AN AGITATED VESSEL Joanna Karcz, Lukasz Kacperski
More informationUniversity Turbine Systems Research 2012 Fellowship Program Final Report. Prepared for: General Electric Company
University Turbine Systems Research 2012 Fellowship Program Final Report Prepared for: General Electric Company Gas Turbine Aerodynamics Marion Building 300 Garlington Rd Greenville, SC 29615, USA Prepared
More informationNumerical Simulation on Cavitation in a Vane Pump with Moving Mesh
ICCM2014 2830 th July, Cambridge, England Numerical Simulation on Cavitation in a Vane Pump with Moving Mesh *Qunfeng Zhang¹,2, X.Y. Xu 3 1 School of Civil Engineering, Beiing Jiaotong University, Beiing,
More informationDispersion diagrams of a waterloaded cylindrical shell obtained from the structural and acoustic responses of the sensor array along the shell
Dispersion diagrams of a waterloaded cylindrical shell obtained from the structural and acoustic responses of the sensor array along the shell B.K. Jung ; J. Ryue ; C.S. Hong 3 ; W.B. Jeong ; K.K. Shin
More informationDimensional Analysis
Dimensional Analysis An Important Example from Fluid Mechanics: Viscous Shear Forces V d t / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / Ƭ = F/A = μ V/d More generally, the viscous
More informationNumerical modeling of damreservoir interaction seismic response using the Hybrid Frequency Time Domain (HFTD) method
Numerical modeling of damreservoir interaction seismic response using the Hybrid Frequency Time Domain (HFTD) method Graduation Committee: Prof. Dr. A.V. Metrikine Dr. Ir. M.A.N. Hriks Dr. Ir. E.M. Lourens
More informationVista: A Multifield Object Oriented CFDpackage
Vista: A Multifield Object Oriented CFDpackage T. Kvamsdal 1, R. Holdahl 1 and P. Böhm 2 1 SINTEF ICT, Applied Mathematics, Norway 2 inutech GmbH, Germany Outline inutech & SINTEF VISTA a CFD Solver
More informationProceedings of OMAE'01 20 th International Conference on Offshore Mechanics and Arctic Engineering June 38, 2001, Rio de Janeiro, Brazil
Proceedings of OMAE' 2 th International Conference on Offshore Mechanics and Arctic Engineering June 38, 2, Rio de Janeiro, Brazil OMAE2/SR259 PROBABILISTIC MODELLING AND ANALYSIS OF RISER COLLISION
More informationCFD Applications using CFD++ Paul Batten & Vedat Akdag
CFD Applications using CFD++ Paul Batten & Vedat Akdag Metacomp Products available under Altair Partner Program CFD++ Introduction Accurate multi dimensional polynomial framework Robust on wide variety
More informationFinite Element Analysis for Acoustic Behavior of a Refrigeration Compressor
Finite Element Analysis for Acoustic Behavior of a Refrigeration Compressor Swapan Kumar Nandi Tata Consultancy Services GEDC, 185 LR, Chennai 600086, India Abstract When structures in contact with a fluid
More informationCustomer Training Material. Lecture 5. Solver Settings ANSYS FLUENT. ANSYS, Inc. Proprietary 2010 ANSYS, Inc. All rights reserved.
Lecture 5 Solver Settings Introduction to ANSYS FLUENT L51 Solver Settings  Introduction So far we have looked at how to setup a basic flow simulation in FLUENT. However you should not assume that just
More informationA CODE VERIFICATION EXERCISE FOR THE UNSTRUCTURED FINITEVOLUME CFD SOLVER ISISCFD
European Conference on Computational Fluid Dynamics ECCOMAS CFD 2006 P. Wesseling, E. Oñate and J. Périaux (Eds) c TU Delft, The Netherlands, 2006 A CODE VERIFICATION EXERCISE FOR THE UNSTRUCTURED FINITEVOLUME
More informationParallel MPS Method for Violent Free Surface Flows
2013 International Research Exchange Meeting of Ship and Ocean Engineering (SOE) in Osaka Parallel MPS Method for Violent Free Surface Flows Yuxin Zhang and Decheng Wan State Key Laboratory of Ocean Engineering,
More information