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Numerical Simulation.
The characteristics of tunnel fire are analyzed, and the numerical simulation of some tunnel of Shenyang railway is made with the CFD software star-ccm+ 5.02, which applies the field modeling method.
This paper uses CFD simulation software star-CCM + 5.02 to make a more precise image fire numerical simulation of some tunnel of Shenyang subway no.1th line to analysis the concentration field and the temperature field.
From the numerical simulation, we can get the more comprehensive understanding of tunnel fire characteristics and development law of gas.
Aanalysis of the results of simulation Numerical simulation analysis of the critical wind speed .The interior space of the tunnel is long and narrow, once the fire occurs, consequence is unimaginable.

Postal code: 266061  ayangwm@mail.bust.edu.cn, b bwj2010best@126.com, clishujiang2000@126.com Keywords: blade,rotating basin,numerical simulation,airflow velocity,software.
Traditional fluid mechanical design method is to use the experimental data and experience equation to test,and the test data is not accurate to show the movement of the blade rotating basin due to the change of the structure.With the rapid development of fluid dynamics, and the method of numerical simulation is widely used to analyze the change situation of the basin, and it also can optimize the fluid machinery.
Scenery tower power generation device of the fan blade model is established with the UG software, using ICEM CFD to mesh division and the FLUENT is used to doing numerical simulation.
Grid division Due to the fan blade in rotating area,building grid model as shown in Fig.2 to make the simulation results are accurate.Using irregular grid division of the tetrahedron in the ICEM CFD,because its structure is complex.By setting up the corresponding parameter to improve grid density and setting 3 boundary layers in the after margin of blade, to better simulate the effect of blade rotation basin.Grid division model is shown in Fig.3 .
Computational fluid dynamics analysis—CFD software principle and application[M].Beijing: Tsinghua university press, 2004.

The simulations are performed in ANSYS FLUENT14.
Simulation is based on the criterion which identifies the emergence of non-Darcy flow.
While considering porous media simulations, a porous material is defined as an adsorbent used in the simulation.
For Computational Fluid Dynamics (CFD) modeling approach towards fluid flow in porous media, John White used the extended Darcy model to predict the resistance caused by the medium [4].
Shariff., Modeling and Simulation of Fixed Bed Adsorption Column using Integrated CFD Approach, Journal of Applied Sciences 10 (24):(2010) 3229-3235

Numerical simulation for solid–liquid two-phase flow in stirred vanadium leaching tank Kong Jian-yi a ,Wu Zong-wu b ,Hou Yu c ,Wang Xing-dong d Wuhan University of Science and Technology, Wuhan, 430081, PR China a 13607158659@139.com ,b15971432396@163.com , c249732412 @qq.com, d442309012 @qq.com Keywords: leaching tank;solid-liquid two-phase flow;turbulence;turbulent kinetic energy Abstract.The flow field in the leaching tank for the vanadium extraction in the stone coal was simulated by the Computational Fluid Dynamics (CFD) software.
The simulation results have certain reference value for the research of the law of the inner flow field so as to optimize its structure in the stirred reaction vessel.
The stirring speed is 100 r/min in this simulation.
Fig.2 Mesh Graph Numerical Simulation Strategy Simulation Method.The Reynolds Number in the stirred tank was calculated by the formula “”.
[2] Wang Fu jun.Computational fluid dynamics analysis-Principle and application of CFD software[M].Beijing:Tsinghua University Press,2004 [3] Zhu Rong sheng,Li Wei bing,Huang Dao jian,etal.Numerical simulation of mixing flow field in the blender[J].

CFD is used to examine the flow features of the throttle notches of valves.
A wide variety of notch types have appeared in hydraulic valves in industrial applications, of which four types as shown in Fig.2 are chosen for the simulation and analysis of features.
CFD Analysis and Results.
[4] Xia G H, Zhao Y, Yao J H (2009) Parallel unstructured multigrid simulation of 3D unsteady flows and fluid-structure interaction in mechanical heart valve using immersed membrane method.
[6] C Srikanth, C Bhasker (2009) Flow analysis in valve with moving grids through CFD techniques.

Autodesk softwares were used to perform CFD and FEA.
Introduction The virtual prototype is a digital simulation of the respective physical prototype.
Failure to do so, would point out an error in proposed simulation scenarios.
Simulation CFD 2013 (CFD software) to acquire aerodynamic loads on forward fuselage’s FEM 3.
The section is shown in Fig. 3, during start of CFD analysis.

Mixing Quality Improvement of a Coaxial Syngas Mixer by Adding Optimized Mechanical Tabs Using Three-Dimensional CFD Modeling Dominicus Danardono1,a*, Ki-Seong Kim1,b 1Department of Mechanical Design Engineering, Chonnam National University, Jeonnam 550-749, Korea adanar1405@uns.ac.id , bsngkim@chonnam.ac.kr Keywords: Air-fuel ratio; pressure loss; mixing quality; mechanical tabs; coaxial syngas mixer; CFD.
Numbers of iteration were conducted by refining the mesh in every stage of simulation.
After several simulations, it was found that the model would have consistency in result if the mesh consist grid cells more than about 480,000 cells.
In this study, the grid cell volume used in the CFD simulation was set for about 500,000 cells.
Chung, Investigation on hydrodynamics and mass transfer characteristics of a gas-liquid ejector using three-dimensional CFD modeling, Journal of Mechanical Science and Technology. 22 (2008) 1821-1829

Took a typical soil-walled passive greenhouse located in Jinan, Shandong, China as an example, an unsteady tri-dimensional numerical simulation was applied to solve the temperature and humidity profiles under natural ventilation conditions inside the greenhouse, based on the CFD program.
The simulation results agree well with test values about the temperature and humidity inside the greenhouse with fitting degree of 99.8% and 99.7%, respectively.
With the development of computer technology, computational fluid dynamics (CFD) software becomes a powerful tool to study the spatial distribution of thermal and moisture environment in greenhouse.
The simulation results and the experimental data of greenhouse operating parameters which include the indoor air temperatures as well as the RH are compared for validation, as shown in Figures 1 and 2.
Lee, “3-D CFD analysis of relative humidity distribution in greenhouse with a fog cooling system and refrigerative dehumidifiers”, Biosysrems Engineering, Vol. 100, issue 2, 245-255, 2008 [3] Boulard, T. and S.

The CFD calculation results, the experimental results and the Bladed results can be used to confirm the reliability of the model.
This paper calculates the CFD calculation, while experimental tests of pneumatic power and thrust were compared, including ‘CFD’, according to the results of the numerical calculation.
The CFD in the 8.5m/s, 11m/s and the rated wind speed of 14m/s involves three conditions of the results.
Firstly, the visible, for pneumatic power, at low wind Super 8.5m/s, secondly the CFD calculated values, which are slightly lower than the experimental values, and finally the other two conditions need to be in agreement with the calculated values for CFD.
Conclusions In this paper, the establishment of FlowVision numerical simulation on aerodynamic performance of wind turbine yaw effect based on the unsteady CFD, can be summarized as follows: 1) leaf segments and the application of the sliding grid method were used to calculate CFD in order to greatly reduce the number of grids and save computing resources; 2) in the axis, direction flow conditions, the numerical method can simulate the aerodynamic characteristics; 3) in the 11m/s wind shear conditions, this reduction canmore accurately reflect pneumatic power, while with regard to the variations in wind shear conditions of pneumatic power, thrust and torque performance parameters appear periodically; 4) the wake is constantly expanding, the expansion degree of different cross sections are different.

The oil film temperature distribution in different input state is obtained through CFD analysis by FLUENT.
In this paper, the FLUENT software is applied to Simulation analysis.
CFD analysis of the bearing thermal characteristics Building the film model and dividing the grid.
In order to accurately analyze the impact of the oil temperature for the oil film temperature field, simulation analysis is used to solve the temperature field distribution of oil film at different temperatures.
Conclusions Through simulation analysis for bearing input parameters, the following laws could be obtained.