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This paper uses CFD technology to simulate the exhaust plume of a specific rocket on different working conditions, with two-phase flow involved.
To have a precise simulation of solid rocket exhaust plume, two-phase flow must be considered appropriately.
During the simulation, the reaction between the exhaust and ambient air is not involved.
Numerical simulation of composite solid propellant rocket motor exhaust plume[J].
Simulation of the two phase flow in solid rocket motors[C]. 32nd Joint Propulsion Conference and Exhibit, 1996

The Steady flow simulation to selected the delta wing model for different angles of attack in the Maher number.The law of flow field changes with the angle of attack is gotten.Through the FLUENT simulation,The variation tendency of coefficient of lift and drag in the different angle of attack is gotten.Further reveals the change rule of Maher number, pressure, velocity and other parameters in the different angle of attack.With increasing angle of attack, Maher number distribution is sparse of the same position increases and the greater numerical.the distribution of velocity vector is sparse of the same position increases and the greater numerical.the pressure distribution is sparse of the same position increases and the greater numerical.
The master equation of numerical simulation to the wing spoiler can use Euler equation can also use N-S equation.
The fluid is compressible ideal gas, the set up of outer boundary condition according to the “far field pressure”.The far field pressure boundary condition:For the simulation of infinite free compressible flow,the free stream Mach number and static conditions known.
Summary From the simulation results we can get the following conclusions
[2] Zhang Jun,Zhao Feng,Zhou Lian Di et al.Flow visualization experiments and CFD simulation on flow around airfoil at large attack angle,J.Ship building of China Vol.41 (2000),p. 22-27

It will extract the simulation animation and the contact force between cutter and rock. 4.
Cutting simulation for different hole conditions in the figure 8, 1) no holes borehole cutting process simulation.
After ANSYS dynamics simulation calculation and analysis, VB program will output the simulation animation and data of the resulting file to the data interface.
Figure10: Cutting simulation animation Figure9: Cutting force data 5.
Development of Hydrochlone’s Optimize-Design System Based on CFD, Oil Field Equipment [J], 2007, 40-42

Model structure and numerical study method In this work, a comprehensive model of fluid dynamics and species transport is applied to the kitchen extractor modeling by using computational fluid dynamics commercial (CFD) software FLUENT.
Negative pressure of the pumping circle and positive pressure of the gas-film-jet used in 10 simulation cases are presented in Table 2.
Pressure boundary conditions in different cases Simulation Results 3D-calculation results of single case.
Followings are the simulation results on the z=0 sectional plane under the condition of Case2, as shown in Fig. 3.
Numerical simulation of kitchen ventilation.

Numerical Simulation Method The geometric dimensions of the compressor studied in this paper are shown in table 1, Numerical calculation relies on NUMECA software.
This paper carries on simulation study on the other four parameters.
Similarly, the results of simulation study show that parameters "d","e","f" have less effect on the performance of compressor.
Large-eddy simulation of the flow in a low speed centrifugal compressor.
Comparison of turbulence methods in CFD analysis of compressible flows in radial turbo machines.

The Passive Ventilation Energy-saving Strategies of Urban Long-distance Bus Station Guohua Tian1,a, Tingshen Li2,b, Xianguang Gu3,c and Xingyu Xie4,d 1JiangSu Institute of Architectural Technology, Xuzhou, Jiangsu, 221008, China 234School of Mechanics & Civil Engineering ,China University of Mining and Technology, Xuzhou, Jiangsu, 221008, China atgh0208@163.com, b407255050@qq.com, c24915017@qq.com, d827777615@qq.com Keywords: Bus Station, Passive Ventilation, CFD Abstract.
General layout and some perspectives of the station Simulation analysis of ventilation status The article chooses the waiting hall as the main study object, to simulate and analyzes Xuzhou Long-distance Passenger South Station.
Fig.2 shows the simulations of the station, because the first layer connects with the distribution hall, the entrance can bring fresh air to the interior, with the outlet disposed in parallel, to improve the level of air flow to some extent.
Now, it is necessary to quantify the simulation analysis to verify the accuracy of above strategies.
The results of simulation analysis: Fig.7.

For the analysis of various extruder models are used not only testing, but also diverse simulation techniques.
I�TRODUCTIO� Not only testing but also diverse simulation techniques are recently used to analyze various extrusion models.
(a) Standard Plate modelling data value (b) �umber 1 Plate (c) �umber 2 Plate (d) �umber 3 Plate (e) �umber 4 Plate (f) �umber 5 Plate (g) �umber 6 Plate Fig. 6 Rate of Plates Fig. 7 shows plate simulation values in graphs.
[3] Dong-Seong Kwag, Woo-Seung Kim and Min-Young Lyu, 2001, "Three-Dimensional Heat and Fluid Flow Simulations for Non-Newtonian Fluid in a Single Screw Extruder", KSME, pp. 337~342
"Cfdesign Technical reference : Upfront CFD"

Fig.1 Residential quarter plan in baidu map Fig.2 Target buildings in simulation Building indoor environment and outdoor environment is inseparable, should be a system, outdoor environment will have a direct impact on the indoor environment, simulation should be from the outside to the indoor, the simulation results of outdoor should become boundary conditions of indoor simulation, so this simulation in three steps, As shown in figure 3.
The first step is wind simulation of large-scale environment, the goal is to get building surface wind pressure and provide boundary conditions for the next step simulation; the second step is wind simulation of medium-sized environment, namely floor wind environment simulation, its purpose is to examines the whole floor roughly wind environment conditions; the third step is microenvironment simulation, Its purpose is examination room internal interior wind environment, thus the wind environment for the entire buildings are optimized.
Fig.5 is the floor simulation model, and floor is modeled by actual size.
Results and analysis of floor wind environment simulation Simulated calculation values of outdoor selected as boundary conditions in floor wind environment simulation.
But this simulation is in a limit state that means all windows and doors in open cases.

Numerical Simulations of Aerodynamic Feature for Variable Speed Offshore Wind Turbine Ping He a , Naichao Chen b and Danmei Hu c School of Energy and Environment Engineering, Shanghai University of Electric Power, Shanghai, 200090, China a hyccnc@126.com, byeiji_chen@126.com,cHudammei@sheip.edu.cn Keywords: Offshore wind turbine, Variable speed, Two-phase flow, Stall speed, Wind force.
Table 1 Geometrical parameters of NRELS809 series aerofoil Radius (m) Chord length (m) Established angle (°) Radius (m) Chord length (m) Established angle (°) 0.508 0.218 0 2.867 0.574 2.083 0.66 0.218 0 3.172 0.543 1.15 0.884 0.183 0 3.185 0.542 1.115 1.009 0.349 6.7 3.476 0.512 0.494 1.068 0.441 9.9 3.781 0.482 -0.015 1.133 0.544 13.4 4.023 0.457 -0.381 1.258 0.737 20.04 4.086 0.451 -0.475 1.343 0.728 18.07 4.391 0.42 -0.92 1.51 0.711 14.29 4.696 0.389 -1.352 1.648 0.697 11.9 4.78 0.381 -1.469 1.952 0.666 7.979 5 0.358 -1.775 2.257 0.636 5.308 5.305 0.328 -2.191 2.343 0.627 4.715 5.532 0.305 -2.5 2.562 0.605 3.425 　 　 　 Fig.1 Three-dimensional simulating model of horizontal-axis wind turbine CFD Calculation.
A computational fluid dynamics (CFD) method is adopted to exploit the aerodynamics of offshore wind turbine in this work.

Since fully laminar simulation will get too large separation zone and lower pressure peak after the reattachment point, turbulence effect becomes important.
(a) 2nd-order MUSCL scheme (b) Hybrid scheme Fig.5 Density contours in the symmetry plane (a) Different slope limiters (b) Different schemes Fig.6 Surface pressure distributions (a) Viscosity coefficient distribution (b) Surface pressure Fig.7 Results for 25-50°double-cone calculated by turbulence and transition models Conclusions In this present work, we carried out a series of numerical simulations of the hypersonic 25°-50° double-cone flow.
References [1] P.Gnoffo, CFD Validation Studies for Hypersonic Flow Prediction.
Nompelis, CFD Validation for Hypersonic Flight: Hypersonic Double-Cone Flow Simulations.