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Recently, a few authors have focused on the impact and deformation behaviors of spray particle by simulation such as in [1, 2].
�umerical Method As can be seen in Fig.1, the high pressure and high temperature Helium gas was taken into a converging/diverging gun, also called de Laval nozzle, using Ansys/CFX® Computer Fluid Dynamics (CFD) simulation program.
Then, the total simulation time for explicit dynamic analysis was set as 66ns.
It should be also recognized that all the simulation were conducted without considering the oxide films and the possible adhesion between particle/substrate as well as particle/particle, which will commonly cause the bounce of particle after simulation.
With all the previous settings and from the CFD model outputs, the explicit dynamic analysis finished normally in 66ns by using Ansys/Autodyn® simulation software.

Numerical Simulation of The Flow and Heat Transfer of Fractal Tree-like Minichannel Heat Exchanger Sun Jian,Huang Zhangfeng,Zhang Renping School of Material Science and Engineering,Jingdezhen Ceramic Institute,Jingdezhen,China ajian933@163.com Keywords: Tree-like minichannel; heat transfer;fluid flow Abstract.
A three-dimensional steady-state laminar flow and heat transfer model for fractal tree-like minichannel heat exchanger is developed.The fluid flow and heat transfer process is studied by CFD software.
Fig.1 3D model of minichannel heat exchanger Table.1 Fractal tree-like channel size k Lk/mm dk/mm hk/mm wk/mm 1 2 3 4 5 6 7 40.00 28.28 20.00 14.14 10.00 7.07 5.00 3.20 2.54 2.01 1.60 1.27 1.00 0.80 2.4 2.4 2.4 2.4 2.4 2.4 2.4 4.80 2.69 1.73 1.20 0.86 0.63 0.48 Fig.2 Top structure of the heat exchanger Fig.3 Bottom structure of the heat exchanger Calculated result and analysis (c) Temperature distribution of bottom surface (c) Temperature distribution of top surface Fig.4 Temperature distribution of the fractal heat exchanger The fluid flow and heat transfer process is studied by CFD software.
The fluid flow and heat transfer process is simulated by CFD software.

At present, the major techniques to study the critical velocity are experiment and Computational Fluid Dynamics(CFD).
They used propane gas as the fuel and carried out a series of experimental tests and CFD simulations to five small-scale model tunnels having different cross-sectional geometry.
Numerical Simulation of Critical Velocity Using FDS Geometry and Initial Conditions of the Numerical Simulation.
The simulation time was set to be 240s.
Fig.2 Simulation results when fire heat release rate is 5MW Values of Dimensionless Critical Velocity Predicted by FDS Simulations and Calculated by Wu’s Model.

Numerical optimization of oilfield heating furnace research Jienan Dong *1,a ,Xu Su*2,b,Tong Chen 3,c,Miao Wang4,d,Xiaoxu Li 5,e 1,2,4,5Northeast Petroleum University, China 3Daqing Oilfield Natural Gas Company, China a592153337@qq.com,b392884016@qq.com,ctrqchent@petrochina.com.cn, d55836068@qq.com,e1300555999@qq.com Keywords: Oil Field Heating Furnace, Numerical Calculation,Chemical Reaction Flow Abstract.In this paper,using numerical simulation tools PHOENICS for numerical simulation study is made on furnace gas burning in the hearth, and analyses furnace oil furnace temperature distribution in the flow field characteristics the internal flow field of oil field heating furnace hearth temperature distribution characteristics.
Table 1 Inlet boundary conditions Load condition air mass flow (m3/h) gas flow (m3/h) gas Temperature gas pressure kPa 20% 31 300 21 4.2kPa 60% 90 900 100% 150 1500 Numeric Simulation Results and Analysis 20% load condition.
(4) Because of the complexity of the problem, software functions and the limitations of computer performance, making some calculation results of the numerical simulation and the actual situation has certain deviation.
Computational Fluid Dynamics (CFD) and its application in engineering [J].
Multiple Block Grid Generation in the Interactive Environment [J]. 1990 [6] Fujunwang.Computational fluid dynamics analysis-CFD Software Principles and Applications [M].

Tests and simulations provide strong proofs for the structure design and motion control of the robot.
CFD (Computational Fluid Dynamics) software package is used to pre-process (including geometric modeling and mesh generation), calculate and analyze the flow field force acting on robot [7].
The dynamics equation based on space operator algebraic (SOA) method is established, and flow field acting on the robot pre-calculated by CFD software package, on this basis, the dynamic behavior of the in-pipe robot has been analyzed.
Numerical Simulation and Experimental Study for Vascular Interventional Treatment by Bifurcated Artery[D].
Collaborative Simulation Based on MATLAB/Simulink and FLUENT. 2007, 19(1) 1824-1827, 1856(in Chinese).

Numerical Simulation of the Performance of Gas Turbine Combustor LIU Kai School of power and energy engineering Shenyang Aerospace University, Liaoning, Shenyang, 110136.China email liukai1971@163.com Keywords: gas turbine; combustor; velocity field; temperature field; numerical simulation Abstract.
Numerical simulation of the performance of QD128 gas turbine combustor was finished using CFD method.
In this paper, numerical simulation of QD128gas turbine combustor was done, in order to master flow and combustion of the combustion chamber, to master combustion chamber design features, and then to provide the necessary information for troubleshooting and improvement the gas turbine Numerical simulation of the basic equation 1.1 Mathematical model.
Numerical simulation and results analysis Simulation condition is base load in this paper, parameters are shown in tab1.
Tab1 Simulation paremeters Total temperature of air T2（K） Air flow ma(kg/s) Nature gas flow mg(kg/s) 634.15 53.34 4000 Nature gas composition is shown in tab2.

Ma1, e and Mingzhu Li1, f 1Qiqihar University, Qiqihar, Heilongjiang, 161006, China alds911@163.com, blxbwjj@163.com, cwangjianjia@126.com, d2494245130@qq.com, e376223524@qq.com, f45525598@qq.com Keywords: Vertical lathe; Hydrostatic thrust bearing; Feedback; CFD; Fluent Abstract.
Then the hydrostatic thrust bearing temperature field distribution and lubricating properties were obtained with the use of computational fluid dynamics (CFD) theory and the finite volume method combined with the segregated solver of FLUENT.
The radial air bearing pressure field of the numerical simulation was done by Liu Bin using the finite difference method.
Simulation was repeated in trial until the calculation results basically does not change with the number of grid changes.
Han: Journal of System Simulation.

Next, it presents the development of CFD-based motion simulator for guidance and control of PLATYPUS[4].
We have developed a CFD-based motion simulator for guidance and control of PLATYPUS.
Point to Point (PTP) Control Simulation using Fuzzy Control Algorithm.
We analyzed fluid-structure interaction using FEM program and CFD program iteratively at each step.
Fukui: Motion Simulation of an Underwater Vehicle with Mechanical Pectoral Fins Using a CFD-based Motion Simulator, Int.

Simulation and Comparative Analysis on Environmental Control in Subway Liuming1, a, Zhang Baogang1, b, Wen Liu3, Huang Zhongzhi2 1 School of architecture and fine art, Dalian University of Technology, Dalian, China 2 Faculty of infrastructure engineering, Dalian University of Technology, Dalian, China 3 Municipal and environmental engineering college, Shenyang jianzhu University, Shenyang ,China aemail：liumingyitj@163.com bemail: Zhangbaogangtj@163.com, Keywords: Subway station; Thermal environment;Ventilation;Numerical simulation;Energy saving.
By using the CFD software, this paper takes an island platform with double-layer of Shenyang as the object to simulate the thermal environment of platform screen door and ventilation in the open system, then detailed analysis on the variation of the temperature field, airflow velocity field in the typical position.
And in view of the average temperature of the hottest month can not reach the standard of the conditions of the air conditioning in summer, so the ventilation system is adapted. this paper takes an island platform with double-layer of Shenyang as the object to simulate the thermal environment of platform screen door and ventilation in the open system by using the CFD software,,then detailed analysis on the thermal environment in the typical position.
Fig.3b Temperature field at 25 m from the train arriving area （planB） Fig. 3a Temperature field at 25 m from The train arriving area （plan A） The comparison simulation results of the temperature at 50m from the train arriving area passing through stairs is shown in Figure 4 .
At the same time,from the former chapter of the hottest month of the numerical simulation can be seen that the use of the open system can also satisfy the requirements of the subway specification，then an open systems can be acceptable in Shenyang area .

Overall pressure drop of pleated aerosol filters The pressure drop of pleated air filters could be expressed as: (5) (6) Since The pleat angle in equation (6) could be expressed as ： Therefore: (7) Where, is permeability of filtration medium,; is tilt angle of filtration medium, is face flow velocity, PRESSURE DROP SIMULATION IN PLEATED FILTRATION MEDIUM Fluid field flow was simulation calculated by CFD software package in this paper.
In order to save computer resources, from the 80 pleats to select the four parts of them to conduct simulation.
Comparison of simulation results and experimental results was shown in table 1.The results of the simulation were different from the results of literature [3], but the simulation results were relatively close to results of experimental tests, it indicating that the simulation method of this paper was acceptable.
The simulation results of RSM turbulence model were in agreement with results of experimental test. 4.
Minimization of Resistance in Pleated-Media Air Filter Designs: Empirical and CFD Approaches.