CHAPTER 4 CFD ANALYSIS


 Julia Williams
 11 months ago
 Views:
Transcription
1 52 CHAPTER 4 CFD ANALYSIS The finite volume based Computational Fluid Dynamics (CFD) technique is used to predict the flow and heat transfer aspects in a cross flow heat exchanger, used in an automobile application.the radiator on which the experiments were carried out, is a cross flow type compact heat exchanger, with water flowing inside tubes, and air cross flowing over the tubes through louvered fins. To understand the flow and thermal characteristics of fluids inside the radiator, a numerical analysis using the computational fluid dynamics tool (CFD) is carried out. The numerical method used for validating the computational results with those of the experiments is discussed in detail in this chapter. 4.1 PHYSICAL AND CFD MODEL The physical domain considered for the CFD analysis is shown in Figure 4.1(d) Figure 4.1(a) identifies the front and top view directions of the radiator. Figure 4.1(b) shows the top view of the radiator, with the two rows of tubes shaded. The geometry periodicity of the radiator in the tube pitchwise (lateral) direction can be easily observed. Figure 4.1.c shows a small region of the radiator in the front view. The fins positioned between the tubes are seen. The fin geometry indicates that it has a periodicity in the tube heightwise (span) direction.
2 53 The computational domain is confined to one fin pitch in the spanwise direction and one tube pitch in the lateral direction, as shown in Figure 4.1(b) and Figure 4.1(c) respectively, which is highlighted with a dashed red line. The length, breadth and height of the computational domain are mm, 9.6 mm (tube pitch) and 3 mm (fin pitch) respectively. To minimize the error due to flow oscillations and flow reversing effects, which are induced due to the numerical algorithm, the inlet and outlet of the computational domain are extended, as shown in Figure 4.1(d Gambit software is used to model the computational domain. Tetrahedral mesh elements are used for meshing the computational model. Surface mesh element sizes are controlled to obtain fine mesh elements close to the fin and louvers. The mesh grows in size outward from the fin and louver to the tubes and extended domains. Top view Outlet towards ambient air Computational domain Front view Inlet from wind tunnel (a) Radiator view directions (b) Top view of radiator Figure 4.1 (Continued)
3 54 Water tubes 4 Air out Water in 3 Computational domain A A Spanwise periodic domain Air in Extended air domain upstream of radiator 2. Water tube row 1 3. Water tube row 2 4. Extended air domain downstream of radiator (c) Front view of radiator (d) Isometric view of computational domain Figure 4.1 Details of Computational domain 4.2 MATHEMATICAL MODEL The commercial version of the CFD software Fluent is employed to perform the simulation. This software uses the finite volume method of discretizing the transport equations. The assumptions made in the CFD simulation are (a) that the flow is stable in the computational domain, and (b) that the fluid in the domain is steady and incompressible. The problem under consideration is governed by the steady three dimensional form of continuity, the ReynoldsAverage NavierStokes equation (RANS), and the energy equation, along with the equations for modelling the turbulent quantities. follows: The governing equations are given in Equations 4.1 to 4.4 as Mass conservation:. ( v ) = 0 (4.1)
4 55 Momentum conservation:.( vv ) =  p +.( ) + g + F (4.2) Energy conservation:. v E p where =. kt. v (4.3) = + (4.4) The temperature distribution inside the solid regions of the model, such as the tube walls and fin, is obtained by solving the energy Equation 4.5 as given below. (k s T s ) = 0 (4.5) The equation will allow to obtain the temperature, not only inside the fin, but also along its surface. The turbulent quantities are modeled using the k model to capture the large fluid strains more effectively. 4.3 BOUNDARY CONDITIONS The analysis is carried out by considering the water flowing through the tube, and the simultaneous heat transfer occurs through the finned surface. Hence, a conjugate analysis is performed, by estimating the conduction and convection parameter, using the solver based on the local flow and thermal conditions. The various boundary conditions used for the present CFD analysis where both hot water and cold air make cross flows in the domain are given below:
5 56 1. Inlet and outlet conditions Air side Inlet v = v in, u = 0 and w = 0 T = T in,a Outlet p = p atm T = T out (Applicable only to the grid cells occurs) where back flow Water side Inlet w = w in, u = 0 and v = 0 T = T in,w Outlet T = T out (Applicable only to the grid cells where back flow occurs) 2. Boundary Surfaces Upper and Lower side = Periodicity Left side and Right side = Periodicity 3. Tube, Fin and Louver walls u = 0, v = 0 and w = 0 No separate temperature boundary condition is needed, as the solver calculates the thermal information in a coupled way.
6 57 The air and water entry flow and thermal conditions are specified as boundary conditions for the computations. All internal flows and thermal conditions are calculated in a conjugate manner. Thus the fin, louver and tube surface heat transfer rates are all calculated, and not specified as boundary conditions. The property values of the air, water and solid materials used in the analysis are given in Table 4.1. Table 4.1 Material properties Fluid material properties Property Water Air Density, (kgm 3 ) Specific heat, C p (Jkg 1 K 1 ) Thermal conductivity, k (Wm 1 K 1 ) Viscosity, µ (kgm 1 s 1 ) e05 Solid material properties Property Aluminium Copper Density, (kgm 3 ) Specific heat, C p (Jkg 1 K 1 ) Thermal conductivity, k (Wm 1 K 1 ) The commercial CFD code Fluent 6.3 is used for simulations in the present conjugate heat transfer analysis. The continuity, momentum and energy equations for three dimensional, incompressible flows are solved on the double periodic domain. The code uses a pressure correction based finite volume solver. Thefluid domain is the air which cross flows over the water tubes, and the solid domain is modeled to effect the conjugate heat transfer. The second order upwinding scheme is used to have higher order accuracy. The homogeneous method of conjugate heat transfer is employed by fluent
7 58 which facilitates the direct coupling of the fluid zone and solid zone, using the same discretization and numerical approach. Hence, it is possible to have an interpolationfree crossing of the heat fluxes between the neighboring cell faces. Among several options for turbulence models, the standard k model of wilcox is chosen after several trials, by comparing the computational results.the local and averaged heat transfer coefficient values on the wall surfaces are estimated, based on the thermal and flow turbulence calculations by the solver. 4.4 GRID INDEPENDENCE TEST The computational domain is extended both upstream and downstream of the core, and the potential back flow is avoided. Initially, the mesh density finalization is done for the computational domain. Tetrahedral mesh elements are used for meshing the computational model. The surface mesh element sizes are controlled to obtain fine mesh elements close to the fin and louvers. The mesh grows in size outward from the fin, and louver to the tubes and extended domains. Different mesh configurations, starting with very coarse to very fine are taken at a particular Reynolds number, and analysed using the Fluent. Three different grids were tested with 0.6, 1.63 and 2.26 million cells, using different meshing parameters. The results were obtained from the computational domain along the axial length, along a line passing through the center of the channel. The line is highlighted as a red dashed line in the inset of Figure 4.2. Figure 4.2 shows the total pressure variation along the chosen axial line, and it has negligible variation across all the three mesh densities tested. The domains with three mesh densities show the differences in the total pressure at the channel inlet. This is due to the boundary conditions used for the numerical study, and the difference in the calculation of the near wall flow features, which will vary with the mesh density.
8 59 Since the outlet boundary condition is atmospheric, which is specified on the radiator outlet, the system pressure drop in the radiator is amplified back to the radiator inlet. Among the three mesh densities tested, the variation between the 1.63 and 2.26 million cells is less. A further analysis of the thermal characteristics along the same chosen line will help in deciding the final mesh parameters to be used Mi Million Mi Million Mi Million Water in Air out Pressure (Pa) Upstream side HEX Core Air in Position along air streamwise direction (m) Downstream side Figure 4.2 Pressure variation along a line passing through the computational domain The variation of the static temperature along the chosen horizontal line between the different mesh densities of 0.6, 1.63 and 2.26 million cells, is shown in Figure 4.3. Good agreement in the local values of temperatures is observed, between the grids of 1.63 million and 2.26 million cells. Since the variation in temperature between these two mesh densities is negligible, it was decided to proceed with the meshing settings and parameters used for the 1.63 million cells for further analysis. For all the cases, the value of the dimensionless distance y + is always maintained at less than 1.
9 60 The homogeneous method of a conjugate heat transfer is employed, which facilitates the direct coupling of the fluid and solid zone, using the same discretization and numerical approach. Hence, it is possible to adopt an interpolationfree crossing of the heat fluxes between the neighbouring cell faces. Temperature (K) Upstream side Mi Million Mi Million Mi Million HEX Core Position along air streamwise direction (m) Downstream side Figure 4.3 Temperature variation along a line passing through the computational domain The scaled residuals for solution convergence are set to 105 for all governing equations, and turbulence quantities, and 107 for energy, and once met, the solution is considered to be converged. After the analysis, post processing is done for the mass weighted average temperatures and pressures, at the inlet and outlet over the computational domain. The pressure, temperature and velocity profiles are taken at the various sections of the fin, for the corresponding Reynolds number. This temperature difference between the inlet and outlet of the core, in turn, is used for calculating the energy transfer, using the basic equation.
10 VALIDATION AND PARAMETRIC ANALYSIS In order to validate the numerical procedure adopted in the CFD analysis, initially the three data sets used in the experiments are used to generate the CFD results, and the results of the analysis are compared with the experimental results. The three sets of CFD data which are validated with the experimental results are given in Table 4.2.Simulations are carried out for the heat exchanger models with different geometrical parameters. The data sets used for the parametric analysis are given in Table 4.3. Validation Cases Table 4.2 Summary of the data sets used for CFD validation Air velocity (ms 1 ) Inlet air temp (K) Water Flow Rate (kgs 1 ) Inlet water temp (K) VC VC VC Table 4.3 Summary of data sets used for parametric analysis SL. NO. Fin Pitch (F P ) (mm) Transve rse Tube Pitch (T P ) (mm) Longitudi nal Tube Pitch(T L ) (mm) Louver Pitch (L P ) (mm) Louver Angle (L a ) (Deg) Number of Longitudina l Tube Rows (N t )
11 62 Table 4.3 (Continued)
12 DATA REDUCTION FOR THE EVALUATION OF f AND j FACTORS In the present work, the heat transfer and flow characteristics of the test heat exchanger are presented in terms of the Colburn j factor and Fanning friction f factor versus Reynolds number. In addition, the f and j factors are also determined using the existing correlations available in the literature as given in the table 1 and compared with the experimentally determined f and j factors. The equations employed in evaluation of the Fanning friction f factor and Colburn j factor are given below. (i) Fanning friction f factor is defined on the basis of an equivalent shear force in the flow per unit heat transfer area and it is represented by Equation 4.6 f = (P/2L) (D h / air v 2 ) (4.6) where P is airside pressure drop (Pa), air is density of air (kgm 3 ), v is inlet air velocity (ms 1 ). (ii) The dimensionless Colburn j factor is represented by Equation 4.7 j = St x Pr 2/3 = (D h /4L) [ln (T i T w )/ (T o T w )] Pr 2/3 (4.7) where St is the Stanton number [dimensionless], Pr is the Prandtl number [dimensionless], T i is the air inlet temperature [ C], T o the is air outlet temperature [ C] and T w is the tube wall temperature [ C]. (iii) Hydraulic diameter of the louvered fin is defined as given in Equation 4.8 D h = 4LA min / A s (4.8)
13 64 where D h is the hydraulic diameter (mm), L is the flow length or Heat transfer matrix depth in the air flow direction (mm), A min is the minimum free flow area (mm 2 ), A s is the total area for heat transfer on the airside (mm 2 ). (iv) The dimensionless Reynolds Number based on hydraulic diameter is represented by Equations 4.9 and 4.10 Re Dh = G D h /µ (4.9) G = A f v / A min (4.10) where A f is frontal area of the heat exchanger (mm 2 ) and G is the mass flux or mass velocity (kgm 2 s 1 ). (v) The dimensionless Reynolds number based on louver pitch is represented by Equation 4.11 Re Lp = G L p /µ (4.11) where L p is louver pitch (mm)
NUMERICAL ANALYSIS OF THERMAL PERFORMANCE OF LOUVER FIN
NUMERICAL ANALYSIS OF THERMAL PERFORMANCE OF LOUVER FIN Deepak Hasurkar Department of Mechanical Engineering, Indira College of Engineering & Management, Pune Dr. Vinayak Kale Department of Mechanical
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 informationFlow Over a Cylinder
Flow Over a Cylinder Abstract In this exercise, the flow over a cylinder is modeled. The cylinder is represented in two dimensions by a circle, and a flow domain is created surrounding the circle. The
More informationA Numerical Study for Optimal Positioning Of Identical Heat Sources with Graded Porous Medium in Mixed Convection Regime
A Numerical Study for Optimal Positioning Of Identical Heat Sources with Graded Porous Medium in Mixed Convection Regime GiranChandran AC* 1 ; Ajay Kumar P V* 2 and PradeepM Kamath #3 *Post Graduate student,
More informationAdvanced Physical Models
Advanced Physical Models Heat Transfer Buoyancy Combustion and reaction modeling Multiphase flows Solidification and melting ME469B/5/GI 1 Heat Transfer Thermal analysis are crucial in many industrial
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 informationEXPERIMENTAL AND NUMERICAL INVESTIGATION OF A LOUVERED FIN AND ELLIPTICAL TUBE COMPACT HEAT EXCHANGER
EXPERIMENTAL AND NUMERICAL INVESTIGATION OF A LOUVERED FIN AND ELLIPTICAL TUBE COMPACT HEAT EXCHANGER Karthik Pooranachandran a, Sheik Ismail Liaguat Ali Khan b, Kulasekharan Narasingamurthi c and Velraj
More informationNumerical Simulation for Improving Radiator Efficiency by Air Flow Optimization
Numerical Simulation for Improving Radiator Efficiency by Air Flow Optimization Salvio Chacko 1, Dr. Biswadip Shome 1, and Vinod Kumar 1 A.K. Agarwal 2, D.R. Katkar 2 1 Engineering Automation Group, Tata
More informationIsentropic and Ideal Gas Density Relationships
Isentropic and Ideal Gas Density Relationships Consider the subsonic flow of a real gas through a smooth duct with a contraction and expansion forming a gradually converging and diverging nozzle. An idealization
More informationHeat Transfer and Thermal Boundary Conditions
Heat Transfer and Thermal Boundary Conditions Headlamp modeled with Discrete Ordinates Radiation Model F1 Outline Introduction Thermal Boundary Conditions Fluid Properties Conjugate Heat Transfer Natural
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 informationBalvinder Budania* and Harshdeep Shergill*
e t International Journal on Emerging Technologies 3(1): 9296(2012) ISSN No. (Print) : 09758364 ISSN No. (Online) : 22493255 Simulation Heat Transfer Enhancement in a Laminar Channel Flow with Builtin
More informationINFLUENCE OF GEOMETRICAL PARAMETERS OF MPFHS WITH FOUR FIN GEOMETRY (SQUARE, TRIANGULAR, CIRCULAR AND DIAMOND) ON THE THERMO HYDRAULIC CHARACTERISTICS
Int. J. Engg. Res. & Sci. & Tech. 2014 Kuber Dwivedi and Nilesh Mohan, 2014 Research Paper ISSN 23195991 www.ijerst.com Vol. 3, No. 4, November 2014 2014 IJERST. All Rights Reserved INFLUENCE OF GEOMETRICAL
More informationDimensional analysis is a method for reducing the number and complexity of experimental variables that affect a given physical phenomena.
Dimensional Analysis and Similarity Dimensional analysis is very useful for planning, presentation, and interpretation of experimental data. As discussed previously, most practical fluid mechanics problems
More informationApplications of Different Numerical Methods in Heat Transfer  A Review
Applications of Different Numerical Methods in Heat Transfer  A Review Prof. N. C. Mehta 1, Mr. Vipul B. Gondaliya 2, Mr. Jayesh V. Gundaniya 3 1 Head of Department, Department of Mechanical Engineering,
More informationCFD SIMULATION OF SDHW STORAGE TANK WITH AND WITHOUT HEATER
International Journal of Advancements in Research & Technology, Volume 1, Issue2, July2012 1 CFD SIMULATION OF SDHW STORAGE TANK WITH AND WITHOUT HEATER ABSTRACT (1) Mr. Mainak Bhaumik M.E. (Thermal Engg.)
More informationHEAT 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 informationModeling Periodic Flow and Heat Transfer
Tutorial 2. Modeling Periodic Flow and Heat Transfer Introduction Many industrial applications, such as steam generation in a boiler or air cooling in the coil of an air conditioner, can be modeled as
More informationMETHOD TO MAXIMISE THE HEAT TRANSFER THROUGH FINS
14 METHOD TO MAXIMISE THE HEAT TRANSFER THROUGH FINS Karan sehgal, Anuj pratap, and Ravi kuhar Students, Department of Mechanical Engineering, Dronacharya college of engineering, Gurgaon, India karansehgalgurgaon@gmail.com,
More informationAnalysis of Building Performance using Computational Fluid Dynamics (CFD) Richard Chitty
Analysis of Building Performance using Computational Fluid Dynamics (CFD) Richard Chitty Content Computational Fluid Dynamics (CFD) Natural Ventilation System Wind Application Fire Safety Application Conclusion
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 informationPerformance of Louver Fin Pattern as Extended Surface Used To Enhance Heat Transfer  A Review
RESEARCH ARTICLE OPEN ACCESS Performance of Louver Fin Pattern as Extended Surface Used To Enhance Heat Transfer  A Review Vinayak S. Powar*, Prof. M. M. Mirza** *(Department of Mechanical Engineering,
More informationDetermining the drag force with CFD method ANSYS Workbench Ott Pabut
Determining the drag force with CFD method ANSYS Workbench 11.00 Ott Pabut Tallinn 2010 Task 1 Determine analytically and with CFD method the moment which is generated on the foundation of the water tower.
More informationModule 2 : Convection. Lecture 20a : Illustrative examples
Module 2 : Convection Lecture 20a : Illustrative examples Objectives In this class: Examples will be taken where the concepts discussed for heat transfer for tubular geometries in earlier classes will
More informationENERGY MANAGEMENT CONDUCTION HEAT TRANSFER. Tarik AlShemmeri 1
ENERGY MANAGEMENT CONDUCTION HEAT TRANSFER Tarik AlShemmeri CONDUCTION HEAT TRANSFER If you hold one end of a steel rod and the other end is kept in the fire it will not be very long before your end of
More information1. VELOCITYINLET (7.3.4 of User's Guide): fixes incoming velocities
BOUNDARY CONDITIONS FOR INCOMPRESSIBLE FLOW INLETS: 1. VELOCITYINLET (7.3.4 of User's Guide): fixes incoming velocities Used for incompressible flows (similar to massflow inlet boundary condition that
More informationSIMULATION OF LIQUID METAL MHD FLOWS IN COMPLEX GEOMETRIES
SIMULATION OF LIQUID METAL MHD FLOWS IN COMPLEX GEOMETRIES Vinayak Eswaran Department of Mechanical Engineering Indian Institute of Technology Kanpur (with V.Naveen, R. Paniharan, Profs M.K.Verma and K.Muralidhar)
More informationFluent Software Training TRN Boundary Conditions. Fluent Inc. 2/20/01
Boundary Conditions C1 Overview Inlet and Outlet Boundaries Velocity Outline Profiles Turbulence Parameters Pressure Boundaries and others... Wall, Symmetry, Periodic and Axis Boundaries Internal Cell
More informationSimulation Studies on Porous Medium Integrated Dual Purpose Solar Collector
Simulation Studies on Porous Medium Integrated Dual Purpose Solar Collector Arun Venu*, Arun P** *KITCO Limited **Department of Mechanical Engineering, National Institute of Technology Calicut arunvenu5213@gmail.com,
More informationKeywords: Heat transfer enhancement; staggered arrangement; Triangular Prism, Reynolds Number. 1. Introduction
Heat transfer augmentation in rectangular channel using four triangular prisms arrange in staggered manner Manoj Kumar 1, Sunil Dhingra 2, Gurjeet Singh 3 1 Student, 2,3 Assistant Professor 1.2 Department
More informationFLUENT Lab Exercise 10 Ahmed Car body
FLUENT Lab Exercise 10 Ahmed Car body Introduction The purpose of this exercise is to introduce you to 3D meshing and post processing. This will show you the power of ANSYS meshing. The problem involves
More informationCylinder Drag Coefficient
5 Cylinder Drag Coefficient Flow Simulation can be used to study flow around objects and to determine the resulting lift and drag forces on the objects due to the flow. In this example we use Flow Simulation
More informationEESy Solutions Engineering Equation Solver Newsletter
EESy Solutions Engineering Equation Solver Newsletter Inside this issue: Welcome 1 The Compact Heat Exchanger 1 Organization 3 Heat Exchanger Example 4 AirSide Calculations 5 TubeSide Calculations 7
More information1. Heat removal by coolant flow
V. Convective Heat Transfer 1. Heat removal by coolant flow Heat is transferred from the surfaces of the fuel rods to the coolant. Coolant flow Fig.5.1 1 Convection Phenomena in Reactor System Convection
More informationHeat Exchangers: Theory and Selection
Heat Exchangers: Theory and Selection Heat exchangers are devices that transfer heat between two fluids. They can transfer heat between a liquid and a gas (i.e., a liquidtoair heat exchanger) or two
More informationCylinder Drag Coefficient
5 Cylinder Drag Coefficient COSMOSFloWorks can be used to study flow around objects and to determine the resulting aerodynamic lift and drag forces on the objects due to the flow. In this example we use
More informationRavi Kumar Singh*, K. B. Sahu**, Thakur Debasis Mishra***
Ravi Kumar Singh, K. B. Sahu, Thakur Debasis Mishra / International Journal of Engineering Research and Applications (IJERA) ISSN: 4896 www.ijera.com Vol. 3, Issue 3, MayJun 3, pp.76677 Analysis of
More informationCFD Simulation and Heat Transfer Analysis of Automobile Radiator using Helical Tubes
International Journal of Engineering Research and Development eissn: 2278067X, pissn: 2278800X, www.ijerd.com Volume 11, Issue 01 (January 2015), PP.2435 CFD Simulation and Heat Transfer Analysis
More informationEnhance the Heat Transfer Rate of Finned Tube Heat Exchanger: A Review
Enhance the Heat Transfer Rate of Finned Tube Heat Exchanger: A Review K.S.Parmar 1, M.J.Patel 2, U. R. Soni 3 1,2 M.E.Student, department of mechanical engineering, Gujarat, India, 3 Ph.d Student, Department
More informationANALYSIS OF FULLY DEVELOPED TURBULENT FLOW IN A PIPE USING COMPUTATIONAL FLUID DYNAMICS D. Bhandari 1, Dr. S. Singh 2
ANALYSIS OF FULLY DEVELOPED TURBULENT FLOW IN A PIPE USING COMPUTATIONAL FLUID DYNAMICS D. Bhandari 1, Dr. S. Singh 2 1 M. Tech Scholar, 2 Associate Professor Department of Mechanical Engineering, Bipin
More informationINTERNATIONAL 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 informationStudy of Film Cooling Appliedon a Fixed Blade of a Sector HPT of the CFM567B Engine
IACSIT International Journal of Engineering and Technology, Vol. 8, No. 2, April 2016 Study of Film Cooling Appliedon a Fixed Blade of a Sector HPT of the CFM567B Engine D. Cherrared these operating conditions,
More informationThe Effect of Confluence Angle on the Flow Pattern at a Rectangular OpenChannel
Engineering, Technology & Applied Science Research Vol. 4, No. 1, 2014, 576580 576 The Effect of Confluence Angle on the Flow Pattern at a Rectangular OpenChannel Firooz Rooniyan Department of Civil
More informationHeat Transfer Analysis of Micro Channel Heat Sink
Heat Transfer Analysis of Micro Channel Heat Sink Nivesh Agrawal 1, Mahesh Dewangan 2 1 M.E Student SSGI, Bhilai, India nivesh369@gmail.com 2 Professor Department of Mechanical Engineering SSGI, Bhilai,
More informationExperimental Investigation of Finned Tube Heat Exchanger
Experimental Investigation of Finned Tube Heat Exchanger Jignesh M. Chaudhari Mechanical Dept. & CSPIT,Changa Dattatraya Subhedar Mechanical Dept. & CSPIT,Changa Nikul Patel Mechanical Dept. & MS Uni.Vadodara
More informationME 4310 Heat Transfer Summer II, 2013 Example Problems
ME 4310 Heat Transfer Summer II, 2013 Example Problems Dr. Bade Shrestha G218, Department of Mechanical and Aerospace Engineering Example 1 (Conduction) One face of a copper plate 3 cm thick is maintained
More informationRoad Vehicle Aerodynamics Advanced
CHALMERS Road Vehicle Aerodynamics Advanced CFD Project: Vera TEDDY HOBEIKA & JOHAN ZAYA 10/23/2011 Summary This report is a part of the advanced course of Road Vehicle Aerodynamics and is the final examination
More informationChapter 7. External Forced Convection. Multi Energy Transport (MET) Lab. 1 School of Mechanical Engineering
Chapter 7 Eternal Forced Convection 1 School of Mechanical Engineering Contents Chapter 7 71 rag and Heat Transfer in Eternal Flow 3 page 72 Parallel Flow Over Flat Plates 5 page 73 Flow Across Cylinders
More informationNUMERICAL STUDY OF COOLING ENHANCEMENT: HEAT SINK WITH HOLLOW PERFORATED ELLIPTIC PIN FINS
Third International Conference on Energy, Materials, Applied Energetics and Pollution ICEMAEP2016, October 3031, 2016, Constantine,Algeria NUMERICAL STUDY OF COOLING ENHANCEMENT: HEAT SINK WITH HOLLOW
More informationCFD Analysis and Optimization of a Car Spoiler
International Journal of Mechanical Engineering and Research, ISSN 09734562 Vol. 5 No.1 (2015) CFD Analysis and Optimization of a Car Spoiler C.V.Karthick Bala Murugan 1, P.A.Nigal Ashik 2, P.Raju 3 Assistant
More informationBoundary Conditions. Introductory FLUENT Training ANSYS, Inc. All rights reserved. ANSYS, Inc. Proprietary
Boundary Conditions Introductory FLUENT Training 2006 ANSYS, Inc. All rights reserved. 2006 ANSYS, Inc. All rights reserved. 42 Defining Boundary Conditions To define a problem that results in a unique
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 informationFlow 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) 934 D DAVID PUBLISHING Ramakumar Venkata Naga Bommisetty, Dhanvantri Shankarananda Joshi and Vighneswara Rao Kollati Engineering Aerospace, MCOE,
More informationA fluid cannot resist a shear stress by a static deflection and it moves and deforms continuously as long as the shear stress is applied.
Introduction A fluid cannot resist a shear stress by a static deflection and it moves and deforms continuously as long as the shear stress is applied. Fluid mechanics is the study of fluids either in motion
More informationJournal of Renewable Energy and Sustainable Development (RESD) June ISSN
Numerical Analysis of Fluid Flow and Heat Transfer for Different Fin Designs and Arrangements of Ceramic Plate Fin High Temperature Heat Exchanger Part I Vijaisri Nagarajan a, Yitung Chena*, Qiuwang Wangb
More informationME 144: Heat Transfer Internal Convection (v 1.0) J. M. Meyers
ME 144: Heat Transfer Internal Convection (v 1.0) Initial Remarks Here we examine the convective heat transfer that occurs in internal flows (i.e. pipe flow) There are several equivalent concepts much
More informationInternational Journal of Engineering Research and General Science Volume 3, Issue 1, JanuaryFebruary, 2015 ISSN
NUMERICAL COMPARISON OF THE TUBE BANK PRESSURE DROP USING A CONVENTIONAL NOZZLE POSITION AND AN INLINE NOZZLE POSITION OF A SHELL AND TUBE HEAT EXCHANGER Kartik Ajugia 1, Kunal Bhavsar 2 1 Student, Mechanical,
More informationComparison of Heat Transfer between a Helical and Straight Tube Heat Exchanger
International Journal of Engineering Research and Technology. ISSN 09743154 Volume 6, Number 1 (2013), pp. 3340 International Research Publication House http://www.irphouse.com Comparison of Heat Transfer
More informationEffect of Aspect Ratio on Laminar Natural Convection in Partially Heated Enclosure
Universal Journal of Mechanical Engineering (1): 833, 014 DOI: 10.13189/ujme.014.00104 http://www.hrpub.org Effect of Aspect Ratio on Laminar Natural Convection in Partially Heated Enclosure Alireza Falahat
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 informationReview: Convection and Heat Exchangers. Reminders
CH EN 3453 Heat Transfer Review: Convection and Heat Exchangers Chapters 6, 7, 8, 9 and 11 Reminders Midterm #2 Wednesday at 8:15 AM Review tomorrow 3:30 PM in WEB L104 (I think) Project Results and Discussion
More informationANSYS FLUENT. Electronics Cooling with Natural Convection and Radiation WS41. Customer Training Material
Workshop 4 Electronics Cooling with Natural Convection and Radiation Introduction to ANSYS FLUENT WS41 Goals In this workshop, you will model the heat dissipation from a hot electronics component fitted
More informationNumerical Simulation of a Solar Flat Plate Collector using Discrete Transfer Radiation Model (DTRM) A CFD Approach
, July 68, 2011, London, U.K. Numerical Simulation of a Solar Flat Plate Collector using Discrete Transfer Radiation Model (DTRM A CFD Approach K. Vasudeva Karanth 1* Manjunath M. S. 2 N. Yagnesh Sharma
More informationModeling Proppant Transport in Fractures Using ANSYS. Dr. D. Dakshinamoorthy and Dr. Y. Dai ANSYS Inc
Modeling Proppant Transport in Fractures Using ANSYS Dr. D. Dakshinamoorthy and Dr. Y. Dai ANSYS Inc 1 Outline: Proppant Transport Using ANSYS Overview of proppant transport in fractures Factors affecting
More informationCFD Application on Food Industry; Energy Saving on the Bread Oven
MiddleEast Journal of Scientific Research 13 (8): 10951100, 2013 ISSN 19909233 IDOSI Publications, 2013 DOI: 10.5829/idosi.mejsr.2013.13.8.548 CFD Application on Food Industry; Energy Saving on the
More informationCFD Modeling of a Radiator Axial Fan for Air Flow Distribution
CFD Modeling of a Radiator Axial Fan for Air Flow Distribution S. Jain, and Y. Deshpande Abstract The fluid mechanics principle is used extensively in designing axial flow fans and their associated equipment.
More informationParametric Optimization and Analysis for the Effect of the Helical Coil Pitch On the Heat Transfer Characteristics of the Helical Coil Heat Exchanger
RESEARCH ARTICLE OPEN ACCESS Parametric Optimization and Analysis for the Effect of the Helical Coil Pitch On the Heat Transfer Characteristics of the Helical Coil Heat Exchanger Revendra Verma 1, Hitesh
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 informationEXTERNAL AERODYNAMICS: FLOW OVER A CAR. Source: Automotive Engineering
EXTERNAL AERODYNAMICS: FLOW OVER A CAR Source: Automotive Engineering OBJECTIVE OF AERODYNAMIC CALCULATIONS To compute & visualize velocity and pressure contour over car body surfaces To Predict Aerodynamic
More informationNumerical analysis of heat transfer in a double glass window
Numerical analysis of heat transfer in a double glass window MEHRAN AHMADI, TOORAJ YOUSEFI Mechanical Engineering Department, Amirkabir University of Technology, Tehran, Iran Mechanical Engineering Department,
More informationModeling Periodic Flow and Heat Transfer
Tutorial 2. Modeling Periodic Flow and Heat Transfer Introduction Many industrial applications, such as steam generation in a boiler or air cooling in the coil of an air conditioner, can be modeled as
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 for Supersonic Exhaust Diffuser with Centrebody for High Altitude Testing of Rocket Nozzle
Numerical Analysis for Supersonic Exhaust Diffuser with Centrebody for High Altitude Testing of Rocket Nozzle R.C. Mehta 1) and G. Natarajan 2) 1), 2) Department of Aeronautical Engineering, Noorul Islam
More informationModeling and Simulation of Axial Fan Using CFD Hemant Kumawat
Modeling and Simulation of Axial Fan Using CFD Hemant Kumawat Abstract Axial flow fans, while incapable of developing high pressures, they are well suitable for handling large volumes of air at relatively
More informationKEYWORDS: Mixed convection, Solid Pin fins, Hollow pin fins, perforated fins, Temperature distribution.
[Kumar, 4(6): June, 05] ISSN: 779655 (IOR), Publication Impact Factor: 3.785 IJESRT INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY CONJUGATE MIXED CONVECTION THROUGH PERFORATED EXTENDED
More informationCFD STUDY OF TEMPERATURE AND SMOKE DISTRIBUTION IN A RAILWAY TUNNEL WITH NATURAL VENTILATION SYSTEM
CFD STUDY OF TEMPERATURE AND SMOKE DISTRIBUTION IN A RAILWAY TUNNEL WITH NATURAL VENTILATION SYSTEM J. Schabacker, M. Bettelini, Ch. Rudin HBI Haerter AG Thunstrasse 9, P.O. Box, 3000 Bern, Switzerland
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 informationPrediction of Viscous Coefficient of Venturi Meter under Non ISO Standard Conditions
Prediction of Viscous Coefficient of Venturi Meter under Non ISO Standard Conditions Karthik Ms 1 V Seshadri 2 Department of Mechanical Engineering Professor, Maharaja Institute of Technology, Department
More informationCompact Heat Exchangers for Electronics Cooling
Compact Heat Exchangers for Electronics Cooling The use of liquid cooling in electronics is growing fast. Designers and end users are overcoming hydrophobia and embracing liquid cooling as a viable solution
More informationTutorial 23. Using the Eulerian Granular Multiphase Model with Heat Transfer
Tutorial 23. Using the Eulerian Granular Multiphase Model with Heat Transfer Introduction This tutorial examines the flow of air and a granular solid phase consisting of glass beads in a hot gas fluidized
More informationEco Pelmet Modelling and Assessment. CFD Based Study. Report Number 610.14351R1D1. 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 informationNUMERICAL INVESTIGATION OF LAMINAR NANOFLUID FLOW IN MICRO CHANNEL HEAT SINKS
International Journal of Mechanical Engineering and Technology (IJMET), ISSN 976 634(Print), INTERNATIONAL JOURNAL OF MECHANICAL ENGINEERING AND TECHNOLOGY (IJMET) ISSN 976 634 (Print) ISSN 976 6359 (Online)
More informationAbstract. Nomenclature
1(corrected, original page number 128 in Proc.) THE THEORETICAL AND EXPERIMENTAL INVESTIGATION OF THE HEAT TRANSFER PROCESS OF AN AUTOMOBILE RADIATOR Matthew Carl, Dana Guy, Brett Leyendecker, Austin Miller,
More informationNumerical Investigation of Heat Transfer Characteristics in A Square Duct with Internal RIBS
merical Investigation of Heat Transfer Characteristics in A Square Duct with Internal RIBS Abhilash Kumar 1, R. SaravanaSathiyaPrabhahar 2 Mepco Schlenk Engineering College, Sivakasi, Tamilnadu India 1,
More informationComputational Fluid Dynamics in Biomedical Systems. A Simple Introduction Boyd Gatlin
Computational Fluid Dynamics in Biomedical Systems A Simple Introduction Boyd Gatlin What I Hope To Do Today Define some common terms Identify some applications of CFD in biology and medicine Describe
More informationChapter 6. Energy Conservation. Islamic Azad University. Problems involving conduction: Chapters 23. Transient problems: Chapter 5
Chapter 6 Introduction to Convection Islamic Azad University Karaj Branch 1 Energy Conservation Problems involving conduction: Chapters 23 Transient problems: Chapter 5 Chapter 3: Obtained temperature
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 informationPERIODICALLY FULLY DEVELOPED LAMINAR FLOW AND HEAT TRANSFER IN A TWODIMENSIONAL HORIZONTAL CHANNEL WITH STAGGERED FINS
PERIODICALLY FULLY DEVELOPED LAMINAR FLOW AND HEAT TRANSFER IN A TWODIMENSIONAL HORIZONTAL CHANNEL WITH STAGGERED FINS Oğuz TURGUT 1,* and Kamil ARSLAN 2 1 Gazi University, Faculty of Engineering, Department
More informationNUMERICAL ANALYSIS FOR TWO PHASE FLOW DISTRIBUTION HEADERS IN HEAT EXCHANGERS
NUMERICAL ANALYSIS FOR TWO PHASE FLOW DISTRIBUTION HEADERS IN HEAT EXCHANGERS B.Babu 1, Florence.T 2, M.Punithavalli 3, B.R.Rohit 4 1 Assistant professor, Department of mechanical engineering, Rathinam
More informationExergy Analysis of a Water Heat Storage Tank
Exergy Analysis of a Water Heat Storage Tank F. Dammel *1, J. Winterling 1, K.J. Langeheinecke 3, and P. Stephan 1,2 1 Institute of Technical Thermodynamics, Technische Universität Darmstadt, 2 Center
More informationAERODYNAMIC CHARACTERISTICS OF THE MISSILES MOVABLE WING IN THE PRESENCE OF THE FIXED WING
AERODYNAMIC CHARACTERISTICS OF THE MISSILES MOVABLE WING IN THE PRESENCE OF THE FIXED WING ALİ AKGÜL ROKETSAN Missile Industries Inc., AnkaraTürkiye, aakgul@ roketsan.com.tr EMRAH GÜLAY ROKETSAN Missile
More informationME 144: Heat Transfer Convection Relations for External Flows. J. M. Meyers
ME 144: Heat Transfer Convection Relations for External Flows Empirical Correlations Generally, convection correlations for external flows are determined experimentally using controlled lab conditions
More informationSince the flow is laminar over the entire plate for ReL = , it follows that
Mech 302 Heat Transfer HW6 SOLUTION 1. (Problem 7.17 in the Book) Air at a pressure of 1 atm and a temperature of 40 is in parallel flow over the top surface of a flat plate that is heated to a uniform
More informationTurbulence Modeling in CFD Simulation of Intake Manifold for a 4 Cylinder Engine
HEFAT2012 9 th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics 16 18 July 2012 Malta Turbulence Modeling in CFD Simulation of Intake Manifold for a 4 Cylinder Engine Dr MK
More informationNumerical analysis of natural convection heat transfer from a radial heat sink Ashish Mahalle a, Mangesh D. Shende b a
Available online at www.ijiere.com International Journal of Innovative and Emerging Research in Engineering eissn: 23943343 pissn: 23945494 Numerical analysis of natural convection heat transfer from
More informationCFD Based ThermoHydrodynamic Analysis of Circular Journal Bearing
International Journal of Advanced Mechanical Engineering. ISSN 22503234 Volume 4, Number 5 (2014), pp. 475482 Research India Publications http://www.ripublication.com CFD Based ThermoHydrodynamic Analysis
More informationInvestigation on 3D Wing of commercial Aeroplane with Aerofoil NACA 2415 Using CFD Fluent
Investigation on 3D of commercial Aeroplane with Aerofoil NACA 2415 Using CFD Fluent Rohit Jain 1, Mr. Sandeep Jain 2, Mr. Lokesh Bajpai 3 1PG Student, 2 Associate Professor, 3 Professor & Head 1 2 3
More informationEffect of Pressure Ratio on Film Cooling of Turbine Aerofoil Using CFD
Universal Journal of Mechanical Engineering 1(4): 122127, 2013 DOI: 10.13189/ujme.2013.010403 http://www.hrpub.org Effect of Pressure Ratio on Film Cooling of Turbine Aerofoil Using CFD Vibhor Baghel
More information! f. Topics: Film cooling; Thermal stresses; Impingement Cooling; How to do cooling design. Film cooling:
16.50 Lecture 30 Topics: Film cooling; Thermal stresses; Impingement Cooling; How to do cooling design Film cooling: With internal cooling the heat flux through the blades surface increases as the external
More informationSIMULATION OF CONJUGATED RADIATIVECONDUCTIVE HEAT TRANSFER ON THE SURFACE OF COOLING POND. L. Petkeviciene, P. Vaitiekunas, V.
УДК 536.24 SIMULATION OF CONJUGATED RADIATIVECONDUCTIVE HEAT TRANSFER ON THE SURFACE OF COOLING POND L. Petkeviciene, P. Vaitiekunas, V. Katinas Lithuanian Energy Institute, Breslaujos 3, 3035, Kaunas,
More information