Search results

Simulation of Flow Pattern in MOHVPE Growth Chamber Computational simulation of the reactor geometry was conducted by using CFD/SOLIDWORKS flow simulation software [7].
The main objective of this simulation is to predict the performance of the proposed reactor in terms of flow pattern.
Fig. 3: (a) Uniform meshing of the growth chamber and (b) middle holder stressed out as an observation in simulation.
The simulation was based on the modification of different parameters at each stage.
By using the simulation it is also possible to design the mask for selective area.

Numerical Simulation of a Novel Bipolar Plate Flow Field of Proton Exchange Membrane Fuel Cell C.D.Lu a, P.F.Gao b, W.F.wangc and D.H.Wend Key Laboratory of Special Purpose Equipment and Advanced Processing Technology (Zhejiang University of Technology), Ministry of Education, Hangzhou, 310014, P.R.China alcd@zjut.edu.cn,bGaopengfei.hist@163.com,cwydfangzhang@163.com, dwendh@zjut.edu.cn Keywords: PEMFC, Flow field, Numerical simulation Abstract.
Numerical simulation about both the flow velocity distribution and the pressure distribution for the reactive gas were accomplished according to the model building by Pro/E, grid meshing and boundary condition specifying by Fluent.
This paper presents a novel bipolar plate flow field and completes the numerical simulation on the flow field.
When the electrode on the bipolar plate is flooded with water, the influence on the gas flow is not as serious as that about the conventional flow field with rectangular section, shown as Fig.4: Fig.4 Sketch of the sections of the different flow channels flooded with water Numerical simulation This paper simulates the novel flow field and the conventional serpentine flow field by the professional CFD (Computational Fluid Dynamics) software Fluent in order to research some key factors which have the significant influence on the operation performance of PEMFC such as the velocity distribution, the gas pressure difference between the inlet and the outlet and so on.
Simulation result (a ) intersectant flow field (b) serpentine flow field Fig.5.

CFD Analysis of Perforated Plates and Open-Cell Materials Aerodynamics Antonio F.
Both experimental and numerical simulation studies are available in the literature [5-8].
In this study, simulations were carried out utilizing the finite-volume-based Ansys Fluent code [18,19].
Results and Discussion To validate the flow simulation, pressure gradients across perforated panels with square holes resulting from the numerical simulations are compared to Allori et al. [5,6] experimental data.
Notice that the curve from the numerical simulations is within the experimental error bars.

The wetting and flowing behaviors of the filler metal during laser brazing process were analyzed by the computer simulation.
It followed that the wetting and flowing behaviors of the filler metal during laser brazing process could be predicted by the computer simulation. 1.
The material constants of base metals and the filler metals used in the present computer simulation are summarized in Tables 2 and 3.
It follows that the wetting/flowing behaviors of the filler metal during the laser brazing process can be predicted by the computer simulation.
Customized by CFD Lab., (2006).

Response of Blade Thickness to Hydraulic Performance of Stamping and Welding Multistage Centrifugal Pump MU Jie-gang1,a, ZHU Bo2, b, ZHENG Shui-hua3,c, GAN Jian-jun4,d 1College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China 2College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China 3College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China 4College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou amjg1963@126.com, bzhubo363@163.com, czneu@zjut.edu.cn, dganlet@163.com Keywords: Blade thickness, Stamping and welding multistage centrifugal pump, Numerical simulation, Hydraulic performance Abstract.
Based on CFD numerical simulation, the effect of blade thickness on hydraulic performance was studied in DQ100-64-22 stamping and welding centrifugal pump.
The simulation results about the pump head and efficiency corresponding to different blade thickness are as shown in Fig.3 and Fig.4.

The numerical simulation is carried out to investigate the inherent laws for different blockage ratios of ETT system.
The simulation results show that: when the speed of the train and the pressure of the system are constants, in the temperature field, the aerodynamic heating is getting more as the blockage ratio increases, and its trend grows exponential.
Vol.24 (2005), p.133-137 [3] ZHOU Xiao, Zhang Yaoping, Yao Yingfeng: Air resistance simulation of high-speed trains in the vacuum pipeline transportation.
[10] Han Zhanzhong, Wang Jing, Lan Xiaoping: FLUENT fluid engineering simulation examples and applications. edtied by Beijing Institute of Technology Press, Beijing(2004)
[11] Wang Fujun: Computational Fluid Dynamics：Principles and Applications of CFD software. edtied by Tsinghua University Press, Beijing(2004).

In order to certify the reliability of the numerical simulation and the results conformity, we deemed it necessary to validate our simulations.
We referred to the work of Ameur [9] using the same simulation conditions.
Conclusions In this study, a numerical simulation of the mechanical agitation using a shear thinning alumina nanofluid has been investigated.
Prajapati, F.EIN-Mozaffari, CFD Investigation of the mixing of yield- pseudoplastic fluids with anchor impellers, J.
Heidari, CFD simulation of impeller shape effect on quality of mixing in two-phase gas–liquid agitated vessel, Chinese Journal of Chemical Engineering 28 (2020) 2733–2745

The fin model was verified availably by testing the error between the simulation results and experimental ones.
Then the models were tested with experimental results, and the louvered fin’s key geometry parameters were optimized according to the simulation results.
The simulation was carried on as a fin cycle, to work out respectively the pressure and temperature fields of the air which flowing through fins.
Fig.3 flow trace chart Fig.4 pressure distribution chart Fig.5 temperature distribution chart 2.2 Comparison of Simulation Results and Experimental Ones Through the CFD simulation, the different pressures and temperature between the fin inlet and outlet under different air velocity conditions were obtained.
Compared the simulation results with the experimental results of the radiator Wind Tunnel Tests, the conclusion could be gained that the simulation and experimental results are basically consistent, as shown in Table 1.

Study on the influence of Meteorological Conditions on Particles distribution in Residential Environment Cao Yong1, a, Wang Jianeng2,b, Liu Jing2,c, and Yu Dan3,d 1Institute of Building Environment and Energy Efficiency, China Academy of Building Research, 2Unvirersity of Science and Technology Beijing 3 Beijing University of Civil Engineering and Architecture acabrcao@sina.com, bJianeng_Wang@163.com, cjingliu1998@ustb.edu.cn, dyudan@bucea.edu.cn Keywords: Particulate matter, Residential environment, Weather conditions, CFD Abstract.
And in Hong Huang’s [2] conclusion through numerical simulation, the distribution of pollutants concentration depends on the wind flow and geometric structure of the street canyon.
In this paper the influence of meteorological conditions on the particle diffusion will be researched and the method of numerical simulation will be used.
Conclusions In this paper the distribution features of Particulate matter in residential environment is studied using the method of numerical simulation and considering different wind speed, different wind direction, and different diameter of Particulate.

But the side roughness analysis usually requires a simulation with individual particles considered.
This efficient way avoids the time-consuming calculation of multilayer simulation, but including the key parameters of whole process.
This was carried out by the computational fluid dynamics (CFD) model.
The following simulation cases are all meet this requirement and thus the morphologies of tracks are analyzed in terms of side surface.
Fig. 4 Side roughness under different heat input, data from both simulation and independent literature.