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Numerical Simulation of Heat Flow in a Vehicle Cabin Yang Zeng1, a, Masafumi Katsuta2, b 1, 2Department of Environment and Energy Engineering, Waseda University, Shinjuku, Tokyo 1690072, Japan ayoung.zeng@gmail.com, bkatsuta@waseda.jp Keywords: Heat flow; Heat transfer; Temperature distribution; Numerical simulation; CFD; Vehicle cabin; Abstract.
The heat flow distribution in a simplified 3-D vehicle cabin is predicted when parking in the summer sunshine by using the CFD analysis software.
Numerical simulation procedure The numerical simulation process is shown as follows: First, the 3-D model of the vehicle is established by AutoCAD and meshed by CFD analysis software.
The simulation starting date and time was set at the noon of the 21st in the June this year.
The constant environment boundary conditions were presumed to apply in this simulation.

In this study, computational fluid dynamics (CFD) simulation was used to predict the performance of photoelectrocatalytic (PEC) reactors with surface reactions.
Further experimental work is required to validate the CFD simulation to allow better understanding and improvement of the overall efficiency of PEC reactors.
CFD simulations were performed in the three dimensional (3D) domain.
CFD simulations were performed in the 3D domain, where the 3D illustrations of the studied photoreactor geometries are shown in Fig. 1.
Mohseni, CFD simulation of UV photocatalytic reactors for air treatment, Am.

In this paper, the simulated wind speed in the simulation model CFD based on Fluent is closer to the measured wind speed.
Therefore, for the wind resource assessment in the complex terrain, the nonlinear model CFD based on Fluent will be qualified to response the relationship between wind resource and terrain, simulation accuracy, and has higher simulation accuracy than the linear model WAsP.
Three-dimensional volume mesh of wind field is shown as Figure.2: Fig.2 The site of boundary conditions in simulation domain In the model CFD based on Fluent, define wind profile by using a user-defined function (UDF) as the inlet boundary condition.
The total annual power output of wind farms is 35.86GWh, and the linear model WAsP simulation is 38.37GWh while the nonlinear model CFD simulation is 37.87GWh.
Simulation results show that: the linear model WAsP has a higher accuracy than the nonlinear model CFD based on Fluent in the complex terrain, and the simulated wind speed MAPE by CFD is 9.75%.

Liu School of Mechanical and Manufacturing Engineering, the University of New South Wales Sydney, NSW 2052, Australia Keywords: Abrasive waterjet, CFD simulation, Particle velocity models, AWJ cutting.
In this paper, the dynamic characteristics of particles in an AWJ, typically the particle velocity distribution, are investigated and mathematically modelled based on the findings of a CFD (computational fluid dynamics) simulation study.
Characteristics of Particle Velocity In the CFD simulation of particle dynamic characteristics for AWJs [5,6], a pure waterjet with the peak inlet velocities at the nozzle exit ranging from 600 to 900m/s and nozzle diameters of 0.8, 1.0 and 1.2mm was first considered using a Fluent6 flow solver.
The CFD simulation considered the jet flow domain from the nozzle exit to 50mm downstream.
From a CFD simulation of AWJs, it has been found that the particle velocity decays as the jet travels away from the nozzle, and smaller particles decelerate more rapidly than large particles.

Fig. 4 shows an overview of the model for the FEA IFW simulation.
Coupling of FEA and CFD.
CFD interface model.
Results and Discussion Discussed here are the results from a complete Finite Element Analysis (FEA) simulation of the Inertia Friction Welding (IFW) process and two Computational Fluids Dynamics (CFD) simulations that show possible material flow at the interface between the workpieces.
Results of IFW simulation in DEFORM-2D.

Due to the complex nature of compressors’ geometry, 1D and 2D CFD simulations cannot simulate the physical turbomachineries with sufficient fidelity.
CFD Simulation Strategy Due to the high computational requirements of the simulation, considering the hardware capabilities and the computational time, the rotational periodic boundary condition has been applied in this project.
Meshing: In CFD simulation, the hexahedral elements are commonly used in turbo passages.
Figure 1.Mesh of impeller and wedge diffuser passage Figure 2.Static pressure ratio for stage simulation Governing Equations The unsteady Navier-Stokes equations in conservative form are set as the solve equation in CFD solver [8].
The results demonstrated the potentials of a fully integrated approach to high-fidelity analysis utilizing 3D CFD simulation.

Analysis and Simulation of the Fluid Field in Thermal Water-Jet Nozzle based on ANSYS FLUENT & ICEM CFD Jianzhao Zhou1, a, Xiaopan Xu1, b, Weijun Chu1, c, Zicheng Zhu2, d, Yunhe Chen1, e and Siwei Lai1, d 1PLA Univ. of Sci. & Tech., Nanjing, Jiangsu, 210007, China, 2Xinjiang Agricultural Univ., Urumqi, Xinjiang, 830052, China azhou-jianzhao@163.com, balexander-001@163.com, cchuwj@163.com, dzzc881225@163.com, e1092009281@qq.com, fonefrog5@gmail.com, Keywords: Thermal water jet, jet fluid, CFD, FLUENT, isokinetic core zone.
Through repeated indoor experiments, the simulation results are demonstrated.
Computational Fluid Dynamics (CFD) is based on the discrete numerical methods.
With computer technology and CFD researches continue to develop, the application software is also developed, among which FLUENT is relatively mature, becoming the most widely used CFD software.
In the simulation, the conical angles of these two-kind nozzles are identical.

As for the CFD simulation, the wind tunnel shape computational domain and four settings of the near wall computational mesh were made.
And numerical simulations of this scaled model exterior flow field were carried out using a commercial CFD code, ANSYS Fluent.
Comparisons between the wind tunnel data and the CFD results would be conducive to more accurate simulations for automobile’s turbulent boundary layer and aerodynamic noise.
Near wall streamlines of Mesh 4 CFD results Summary A pressure measurement and CFD simulation comparison investigation was carried out to analyze the CFD simulation accuracy of the near wall local flow field around a 50% scaled sedan model.
On-going unsteady CFD simulation results need be analyzed and compared with more wind tunnel experimental data in order to carry out aerodynamic noise prediction.

In this study, we had developed a program on the purpose of processes improvement for CFD simulation about spent fuel dry storage system.
The PRAs of the simulation models are depend on the standard specifications, similarity, the accuracy of the CFD simulations are depend on the efficiency of the spent fuel dry storage system (DSS) [3][4].
Therefore, such kind of the geometric change should be properly included in the analysis of the CFD simulation for the DSS program.
Description of the actual work For the traditional processes of the CFD simulation, all the thermal properties of the material and its mathematic model are need to hand-calculate each time, in order to simplify the simulation steps, one need to use an auto calculation instead of the hand calculation.
[4] “Numerical Simulation of Thermal Characteristics of VSC-17 Spent Fuel Dry Storage Part I –CFD Modeling”, Yung-Shin Tseng1, F.

An axisymmetric CFD model has been developed to initially examine the steady-state flow characteristics generated by different inlet entry radii.
CFD Models The CFD approach uses the Navier-Stokes equations, as given below in the general form, to calculate the velocity and pressure of fluid flow of the system
Results and Analysis In this research, all computations were carried out using the general purpose CFD software FLUENT.
The volumetric efficiency is found showing a fairly uniform distribution with little distinction between the different simulations.
Conclusions The pressure wave phenomenon discussed previously can be seen in these simulations.