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Research on Cylindrical Launcher with Cylindrical Launch Parameters Simulation ZhuLin Wang 1, a, FanSheng Kong 2, band HaiPing Li3, c Machine Engineering College, Shijiazhuang, China Corresponding author, e-mail: 362632816@qq.com Keywords：Thermal emission,Dynamic grids Unsteady, Numerical Simulation Abstract：Cylindrical launcher is widely used on the battlefield.
Figure2 Whole model figure Analysis on the results of simulation 1 Results of The simulation calculation This paper studies the equipment from the process of movement of 0.5 s, in the process, the equipment movement displacement of 5.11m.
As a result of the limitation of space, this paper only analyzes the simulation results of 0.1 s to 0.3 s.
Rocket gas 3 d complex flow field numerical simulation and engineering application.
Computing power dynamics analysis---the principle and application of CFD software,[M].

Numerical Simulation for Perforation-caused Leakage Diffusion of Buried Gas Pipeline Jing Cui*, Siyue Ma, Yupeng Liang, Yonghui Guo, Xuebin Zhao, Lixue Shi School of Airport, Civil Aviation University of China, Tianjin, 300300, China Keywords: Underground Gas Pipeline; Perforation-caused Leakage; Diffusion Concentration; FLUENT Software; Numerical Simulation Abstract.
CFD software FLUENT is adopted to perform a transient simulation of this problem, by which the changing trend of the diffusion concentration and velocity of methane with time is obtained and the influence from perforation diameter is further investigated.
We suggest a three-dimensional numerical simulation on buried gas pipeline leakage to make the simulation results much closer to the truth.
Gas leakage diffusion in limited space and the numerical simulation of the explosion[D](2011)
The numerical simulation of high-pressure natural gas pipeline leakage diffusion process[J].

The simulation of boiling heat transfer in metal foam tube Sun Bin1,a, Cui Binbin1,b, Liang Chao1,c 1Department of Energy and Power Engineering, Northeast Dianli University, Jilin, Jilin 132012,China a jlsunbin@126.com, b.binfenshijie1987@sina.cn,c 453446902@qq.com Key words: Metal foam, Pressure drop, Boiling heat transfer, Numerical simulation Abstract: A three-dimensional physical mode of metal foam tube was built by CFD software.
The Brinkman-Forchheimer extended Darcy equation and user-defined function(UFD) of the mass transfer and energy transfer between vapor phase and liquid phase compiled by C language were used in the simulation of boiling heat transfer in metal foam tube.
The simulation results agree well with the experimental data.
Under different mass flow rates, the changes of pressure drop per unit length in tube with vapor quality are showed in figure 1.And the simulation results agree well with the experimental data.
It can be seen that vapor phase distributes uniformly in the metal foam tube at the beginning of the simulation (figure 2(a)).

Key processes of heat and mass exchange at the phase interface are simulated by user defined functions (UDF) in commercial CFD software.
Numerical Simulation Modeling.
A two-dimensional model is built for the simulation in this paper, as shown in Fig. 1.
Both simulation and experiment results show that the heat transfer coefficient decrease with the rise of quality.
The result of numerical simulation indicates that: a.

Fig. 1 The planar solid oxide fuel cell stack reported by Jean [3] Fig. 2 The 10-cells short planar SOFC stack air flow model The 3D realistic air flow model and CFD Calculation This paper establishes a realistic 10-cells short planar SOFC stack air flow model with the MEA areas of 75 mm100 mm, shown in Fig. 2, and the air flow model in a unit cell is illustrated in Fig. 3.
Commercial software, FLUENT 6.3 based on the finite volume method is adopted in our CFD calculation[5].
The investigation of the single channel width In this simulation, the total interconnect plane is limited in the region between 73 mm and 75 mm.
Conclusion Realistic 3D 10-cells short planar SOFC stacks are built and investigated through CFD method using the commercial software Gambit and FLUID 6.3.

Study on Radial Load in a Centrifugal Pump with Slope Volute Using CFD NingZhang1a, MinguanYang1b, BoGao1c, ZhongLI1d 1(School of Energy and Power Engineering Jiangsu University Zhenjiang Jiangsu China) azhangningwlg@163.com, byangminguan@ujs.edu.cn, cgaobo@ujs.edu.cn, dlizhong@ujs.edu.cn Key words: Centrifugal pump; Slope volute; Unsteady simulation; Radial load Abstract.
To estimate radial load on the impeller with slope volute, a commercial CFD code Fluent was used to solve the full 3D unsteady Reynolds averaged Navier-Stokes equations (3D-URANS) for several typical flow rates raging from 60%~150% of nominal flow rate.
Coupled simulation[J].

Numerical simulations of the 3D steady flow in the high-speed pump have been carried out by using the software ANSYS CFX 12.0 and the comparative analysis of the velocity, pressure distributions and fluid mechanics in the high-speed pump under three different flow conditions were also carried out, Respectively.
Fig.1 3-D modeling of the high-speed pump Fig.2 Volute and impeller mesh The set of boundary conditions We use commercial CFD software CFX, no-slip boundary conditions in walls, a standard wall function treatment in near-wall region, and select SST turbulence model[5].
Fig.5 High-speed pump head prediction All of the above results are the predicting characteristic performance of high-speed centrifugal pump with splitter blades or without, which is based on the CFD simulation technology.
On the one hand, the simplified simulation method and some details lead the pumps’ head higher.
However, the performance curve variation of simulation values is consistent with experimental value in high-speed pumps under certain criteria, and the result of simulation has a good agreement with the experiments’.

Possibility of generating strong secondary flow in mixing region of twin screw extruder was analyzed numerical FEM simulation using the commercial CFD package Polyflow.
High density polyethylene, HDPE54 purchased from the local market was used as the fluid domain for simulation.
Simulations were performed on 8 different geometries as listed in Table 1.
Anderson, Simulation of distributive mixing inside mixing elements of co-rotating twin-screw extruders.
Hernandez-Ortiz, Polymer Processing – Modeling and Simulation Hanser Gardner Publication, Ohio, 2006

This work was conducted by means of computational fluid dynamics (CFD) using Fluent 6.
The CFD side of the investigation was conducted using Fluent 5 with the microchannel divided in 40 x 40 meshed cells.
Figure 5: Comparison of simulation and observation experiment results for three-dimensional flow patterns [19] The papers draw conclusions from the combined experimental and simulation work.
Using the CFD software CoventorWareTM the model was drawn and solved.
In these CFD packages the geometry was drawn, then it was meshed using brick elements of 2たm, no-slip conditions were applied at the walls, and finally a pressure of 2 bars was applied to the inlets and a pressure of 2 x 10-4 bar was set at the outlet.

Created the fluidization models of the fluidized bed in the CFD software FLUENT, then simulated for improved fluidization process, and given the analysis for fluidization quality.
Simulation of this program in FLUENT indicates that the type of board can eliminate the dead band of splitter board effectively.
Compared to 42°of the original design of the quality of fluidization, choose 40°and 44°cases in simulation.
Simulation result shows in figure 2~4.
Han: Application and Simulation Examples of Fluid Engineering in FLUENT (Beijing Institute of Technology Press, China 2004) (In Chinese)