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A Monte Carlo photon simulation method was utilized for the analysis of optical performance of LED in quantitative terms.
FLOTHERM includes computational fluid dynamics (CFD) solver, which carries out a full 3-D solution of the Navier-Stokes equations for mass, momentum and energy conservation using the finite volume technique [5].
As a boundary condition during thermal simulation, heat transfer coefficient is important to ensure the accuracy of simulation result [3].
In our simulation, heat transfer coefficient was calculated by FLOTHERM based on CFD.
Lee: Analysis of light-emitting diodes by Monte Carlo photon simulation, Appl.

For the study of atmospheric diffusion of particles, it has the following several aspects: Using high-speed photography technology to film in wind-tunnel test and then take data analysis [1]; Conduct a method combined the experimental research and numerical simulation to get movement parameters and velocity distribution function of particles under different working conditions[2]; And using CFD to simulate the migration distance and sphere of action of the radioactive particles in atmospheric area[3].
Also, it provides an effective method for how to set up safety protection distance in nearby tailings area through the simulation of radioactive operating range of tailing sand.
Zhou: Study on Numerical Simulation of Defending Effect of Windbreaks, China, (2001)
[7] J.M.Hu: Numerical Simulation and Application on Windbreak Controlling Granule Raised up at Stack, (2003), P5-46
Xie: Numerical Simulation of Atmospheric Migration of Uranium Tailings Grit Based on DPM, Hengyang, China, (2013), P96-100

Grids are divided to guarantee the simulation accuracy.
Therefore, we design an new internal-mixing nozzle for the icing experiment, and present a numerical simulation method based on the CFD software FLUENT.
Fields simulation setting.
Inner flow field simulation results and analysis.
External flow field simulation results and analysis.

., Prosecká 809/76, Praha 93, 190 00, Czech Republic avladimira.michalcova@vsb.cz, bkuznetsov@itam.cas.cz, cpospisil@itam.cas.cz Keywords: aerodynamics, wind tunnel, bluff body, pressure coefficient, CFD, ABL, ELES Abstract.
Numerical simulation to determine the effects of incident wind shear and turbulence level on the flow around a building.
Wind tunnel test and numerical simulations of wind pressures on buildings in staggered arrangement.
Comparsion of Full-Scale and CFD Results for the Silsoe 6m Cube.
Large eddy simulation of wind over large roughness elements.

This provided theory reference for further study and had realistic meaning. 2 Simulation Model.
The simulation model is SAE notchback 1:1 model.
The grid was very important to the results of simulation[9,10].
Detached eddy simulation over a reference Ahmed car model[C].
CFD-Based Shape Optimization for Optimal Aerodynamic Design.

Fabrication and Investigation of Curved PDMS Micro Nozzle/Diffuser Yu-Tang Chen 1, a , Chin-Chun Hsu 2, b , Shung-Wen Kang 2, c, Lung-Chi Wu 2, c a Department of Mechanical Engineering, De Lin Institute of Technology, Tu-Chen, Taipei, 23646, Taiwan, R.O.C b Department of Mechanical and Electro-Mechanical Engineering, Tamkang University, Tamsui, Taipei, 25137, Taiwan, R.O.C a ytang.chen@msa.hinet.net, b893340025@s93.tku.edu.tw, cswkang@mail.tku.edu.tw Keywords: SU-8, PDMS, Micro Nozzle/Diffuser, Pressure Loss Coefficient, CFD Abstract.
In order to understand the investigation and analysis of fluid dynamics characteristics, we measure the pressure and flow of curved micro nozzle/diffuser and the commercially available software CFD was adopted for analyzing the performance of straight and curved micro nozzle/ diffuser.
We also build a simulation model tested the micro nozzle/diffuser.

Key words: Filling system, Bend pipe, Numerical simulation Abstract.
In their paper, the numerical simulation was carried out in different flow patterns with the help of CFD [7] software.
Method of numerical simulation Flow controlling equation.
Numerical Simulation of Secondary Flow in 90。
Numerical Simulation on Flow Field of 90。

Numerical Simulation of Internal Flow Field on Diesel Centrifugal Gas-Oil Separator Based on CFD Zhiguo Zhao, Wenming Yu HuaiYin Institute of Technology,Huai’an, Jiangsu,China, 223001 Lnzzg98@163.com Keywords: Diesel; Centrifugal Gas-oil Separator; Flow Field; Separation Efficiency.
The simulation results showed that the flow field in the disc clearance was mainly laminar flow, and the flow field at the import and export of the disc was turbulence.
The results of numerical simulation and analysis Velocity Cield According to figure 2, it is known that the gas enters from the entrance at the speed of 2m/s and the speed reaches the peak on the edge of disc through the high rotation acceleration of disc.
Fig.4 The turbulent kinetic energy distribution when t is 11 s Fig.5 The particle distribution Summary 1) Aiming at the low efficiency problem of the traditional gas-oil separator, this paper put forward a kind of centrifugal gas-oil separator and performed the numerical simulation of the interior fluid field character, and the interior fluid field character of centrifugal gas-oil separator was known well, which provided an important theoretical basis for the design and optimization of the centrifugal gas-oil separator. 2) The flow field in the disc clearance is main static flow, the disc import and export are turbulent area.
Demoulin, V.Daru, 2004, "Prediction of the Efficiency of an Automotive Oil Separator: Comparison of Numerical Simulations with Experiments", SAE technical papers series, 2004-01-3019,2004.

Influence of the fins on the Static Stability of autonomous underwater vehicle Minglong Huang1, a, Yuhong Liu1, Hongwei Zhang1, Baosheng Duan2 1School of Mechanical Engineering, Tianjin University, Tianjin 300072, China 2China Oilfield Services Limited Stock Company, Tianjin 300451, China ahuangminglong21@163.com Keywords: Autonomous underwater vehicle; fins; static stability; numerical simulation Abstract: Fins, which are mounted at the rear of the underwater vehicles, have the action of stabilizing.
Phillips [6] derived the steady state hydrodynamic derivatives of an AUV by using CFD to replicate the yawed towing tank and rotating arm experiments.
Results obtained from the CFD method were in agreement with those from the experiments.

Parametric Study of a Micromixer with Convergent-Divergent Sinusoidal walls Arshad Afzal1,a and Kwang-Yong Kim2,b 1,2Department of Mechanical Engineering, Inha University, Incheon, 402-751, Rep. of Korea akykim@inha.ac.kr, barshad_cfd@inha.edu Keywords: Sinusoidal walls, Convergent-Divergent microchannel, Mixing index, flow Separation, Dean vortices.
D w 1st Mixing cycle Numerical Formulation and Mixing Quantification To study the flow characteristics and mixing fluids in the micromixer, numerical simulations were carried out using ANSYS CFX-11 [7], a commercial computational fluid dynamics (CFD) package based on the finite volume method.
The properties of the working fluids (ethanol and water were used in this simulation) were measured at 20 ºC [5, 6] .