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This unsteady flow feature was investigated by the large eddy simulation (LES) method with the sliding mesh technology.
This unsteady flow feature was investigated by large eddy simulation (LES) method with sliding mesh technology [7].
The error is less than 3%, so the results of numerical simulation are credible.
The output from the CFD analyses provided a time history of the pressure variation as the impeller rotated in the volute.
Numerical simulations identify that the staggered arrangement impeller can reduce the levels of pressure pulsation significantly.

A Simulation on Aerodynamic Noise of an Air-conditioning Duck WenkuShi1, a,JianpengYao2, b,SuojunHou3, c,FuxiangGuo4, d,DeguangFang 5,e 1,2,3State Key Laboratory of Aotomobile Dynamic Simulation Jilin university Changchun,China 4,5Nanjing Iveco Motor Company Ltd Nanjing,China ashiwk@jlu.edu.cn bguo6791@126.com Keywords: computational fluid dynamics (CFD)；air-conditioning duck; noise control；aerodynamic noise Abstract.
Transient flow field calculated by LES Large eddy simulation (LES) is a method between the direct numerical simulation (DNS) and Reynolds stress model.
Physical model and CFD model Fig.1, Fig.2 are physical model and CFD model of the duck.
The results from combined simulations are the same as BNS model.
Large Eddy Simulation for Acoustics.

A synthesized simulation process was used to predicting temperature and high cycle fatigue (HCF) of cylinder head in this paper.
The K-εmodel was used to 3D flow simulation of cooling water.
The surface heat transfer coefficient of the block and cylinder head on waterjacket side are determined from previous CFD simulation, and its distributions of waterjacket and FEM model mapped by CFD results were shown in Fig. 5.
Fig. 9 The temperature distribution of Cylinder head Improvement design for heat load of the cylinder head From the previous cooling water jacket CFD simulation, it is known that the average HTC of cooling water jacket surface between the exhaust valves nose region was about 22000 W/(m2/K).
High cycle fatigue safety factor A fatigue life evaluation has been performed based on the stress results obtained from the simulation of the engine cycle.

Through the analysis of the flow field, the unsuitable position of the nozzle was located, and the methods which combine CAD / CAM / CFD was applicated to optimize the structure of the nozzle.
Precisely because of these advantages of numerical simulation, it is gradually becoming a kind of powerful tool which is used to the research of machinery related to fluid.
With the methods combine of simulation and experients.
First of all, make use of PRO / E for solid modeling of the nozzle, and then use the pre-processor Gambit FLUENT to mesh, making use of experimental data to provide boundary conditions in simulation at last.
FLUENT taking advantage of three-dimensional compressible fluid turbulence model for the nozzle flow field numerical simulation by CFD software.By taking the three-dimensional compressible fluid turbulence model, the CFD software FLUENT takes the numerical simulation of the nozzle flow field.

Two structures are compared with the aid of CFD simulation, and the physical model is established based on the field measurement.
In the paper, CFD method is used to analyze ventilation effects in two kinds of workshop structures.
Simulation model Since the aluminum potroom has complicate structure and many kinds of equipment, it is necessary to simplify the physical model properly [5].
Simulation results and analysis According to the above simulation model, the velocity and temperature fields in two workshop structures are obtained.
Numerical Simulation, Tools to Design and Optimize Smelting Technology.

In all CFD simulations different kinds of error occur that can’t be avoided, one source of error is spatial discretization [16].
Comparing experiment and simulation it can be concluded that the simulation results correspond very well for operating points close to the nominal operating point.
Thus it is very likely that the tendency determined by the simulations is correct.
Huang, “Transition Modelling for General Purpose CFD Codes,” Flow Turbul.
Wintergerste, Special Interst Group on “Quality and Trust in Industrial CFD” Best Practice Guidelines, 1st ed.

In recent years, the application of CFD numerical simulation for 3-D turbocharger design begins to be widely adopted with the development of computer technology and the enhancement of calculation method.
CFD simulation was coupled with parameters optimization of the design process and a satisfactory design result was achieved.
Numerical Simulation and Results Analysis of the Original Model Object of study.
A grid-centered finite-volume method was chosen in the simulations.
[2] Hans-Peter Dickmann,Thomas Secall Wimmel,Jaroslaw Szwedowicz,Janpeter Kühnel,Uwe Essig, “Unsteady Flow in a Turbocharger Centrifugal Compressor: 3D-CFD Simulation, Impeller Blade Vibration and Vaned Diffuser-Volute Interaction.,”ASME Paper No.

In this work, pitch motion of the biplane is selected to simulate the disturbance, using the application of Computational Fluid Dynamics (CFD) codes in viscous flow (NS).
In the simulation, The conservation form of Navier-Stokes equations (Eq.3) are solved by a finite-volume scheme.
The one-equation Spalart-Allmaras model is selected to simulate the turbulent flow and the Pseudo-time iteration method is employed for unsteady simulations
Since pitch motion of the biplane is selected to simulate the aerodynamic disturbance, method of mesh motion plays an important role in CFD.
In order to study variation laws of critical frequencies (), more simulations are undertaken with different amplitudes of the sinusoidal pitch angles.

The external flow field of the model was analyzed by CFD module of ANASYS-FLOTRAN.
INTRODUCTION Computational fluid dynamics (CFD) is a kind of analysis which is done by computer numerical simulation and image display about the system that includes physical phenomena of fluid flow.
Numerical simulation of flow-field of 3D car bodies using CFD [J].
Numerical Simulations and Analysis on External Flow Field of Van Body Truck Based on ANSYS CFD.
The Simulation of Air Dynamic of Bus [J].

Investigation of ThermoelectricPowerGeneration Module on Waste Heat Recoveryin a Downdraft Gasifier Ming-YungWang1,a,Ching-PoLin1,b,and Hsiao-Kang Ma1,c 1Department of Mechanical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei, 10617 Taiwan(R.O.C) amill1913@gmail.com, bgene50532@gmail.com,cskma@ntu.edu.tw Keywords:Thermoelectric generator, Biomass, Gasification, CFD Simulation.
The simulation model of downdraft gasifierisperformed by using the Fire Dynamics Simulator (FDS),it’s appropriate for the low-speed, thermally-driven flow simulation with an emphasis on incomplete combustion process.The results demonstrate thatthe simulation temperature of catalyst reactor surface is around 200℃~300℃ which is used toconvert heat into electricity by TEG module.
McGrattan et al. [4-5] developed a three-dimensional CFD model of Fire Dynamics Simulator (FDS) to simulate the scene of fire.
Fig. 4shows thecomparison of experimental and simulation results with temperature at different position in gasifier.The trend of temperature profile is similar to experimental results,the simulation results are higher than experimental results because the simulation model is assumed asan adiabatic condition which indicates no heat dissipation in simulation process. .
Conclusions In this study, the application of FDS model on gasification simulation can effectivelypredict temperature profile of IDGS.