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In this paper some numerical simulations of the Navier-Stokes Equations (NSE) to test the novel NS-α and NS-ω turbulence models [1, 2], which conserve energy, enstrophy, and helicity, are presented.
It takes the order of hundreds of simulations per iteration to evaluate all candidate solutions.
Without analytic solutions to the NSE, scientists have carried out computer simulations, these has been partially successful; for slow moving, viscosity dominated flows on small domains, accurate solutions can be obtained using direct numerical simulations (DNS) of unsteady flow.
This is the reason why it is necessary to find new alternative formulations (like the weak formulations) of the NSE to provide a simulation for the unsteady state.
Also we are working on comparing results obtained with these methods and results provided by other CFD programs.

With the aid of CFD software this problem can be solved well, because we can find the law or disadvantage of the air flow conditions between the fins and around the heat sink by simulation.
Simulation object Figure 3.
Other simulation conditions are as follows.
Numerical simulation of heat sink prototype The Figs. 4 and 5 shows the simulation results of heat sink prototype.
Numerical simulation.

Numerical simulation and experimental study results indicated that the fire turbopump could meet application requirement.
To keep turbopump inner steady flow, numerical simulation is presented to analyze the pressure field.
The flow simulation model is built by PRO/E and unstructured tetrahedral mesh is generated using ICEM.
Turbine Pump Figure.4 Computational domains At present study, the commercially available CFD code, CFX is used.
Wu, et al. 3D Unsteady Turbulence Simulation of the Runaway Transients of the Francis Turbine.

It can be concluded that the modified SST model used in this paper has a good applicability in the unsteady cloud cavitation simulation.
Wang et al [5] studied the cloud cavitating flow around the hydrofoil using large eddy simulation (LES).
In the simulation results, the vapor volume fraction is used to illustrate cavity shape and the deeper color represents higher vapor fraction.
For numerical stability, CFD software tends to ignore the relative velocity between the gas and liquid phase and the thermal effect of phase change, and the dramatic density change of cavitation would be restricted.
From the above, the modified SST model used in this paper has a good applicability in the unsteady cloud cavitation simulation.

Navier–Stokes simulation is performed on a canard guided spinning projectile for different attack angles and circumferential position angles of canard over the Mach number range of 1.8–2.2.
Numerical simulations have the potential of greatly reducing design costs while providing a detailed understanding of the complex aerodynamics associated with each change.
Dual time stepping The “dual-time-stepping mode” was used to perform the transient flow simulations.
Canard configuration The grids used in all the simulations were structured meshes generated using ICEM (see Fig.6).
Computational Fluid Dynamics (CFD) modeling and analysis of the spinning projectile with fixed canard have been conducted to determine the longitudinal aerodynamic coefficients.

These studies results are mainly in applying CFD to compare and evaluate.
It is only through simulation to do some researches.
During the iterative simulation, the pressure is updated.
Flow field pressure in simulation is settled to be an atmospheric pressure.
The experimental study and numerical simulation of the tunnel fire verify the three-dimensional numerical simulation of turbulence model and conduct comparative analysis.

Box 119-13000-Tlemcen Algeria 2Mechanical Engineering Department, Prince Sultan Endowment for Energy and Environment, Prince Mohammad Bin Fahd University, Al-Khobar 31952, Saudi Arabia 3Faculty of Military Science, Stellenbosch University, Private Bag X2, Saldanha 7395, South Africa a*menniyounes.cfd@gmail.com, bachamkha@pmu.edu.sa, cmakinded@gmail.com Keywords: Forced convection, Nusselt number, thermal enhancement, w-baffle, heat transfer aspect.
The simulations were performed for different geometries with varying louver pitch, louver angle and different louver blade number.
The simulations were performed for four rib shapes, i.e., square, triangular, trapezoidal with decreasing height in the flow direction, and trapezoidal with increasing height in the flow direction.
To perform a detailed analysis of the aerodynamic and thermal fields within this model of W-baffled channel, the finite volume approach, by means of Commercial CFD software FLUENT, for a steady-state, incompressible, and two-dimensional flow is used, and the SIMPLE-algorithm is implemented for all calculations.
CFD Solution The two-dimensional, incompressible Navier–Stokes equations and the turbulence model equations are discretized using the finite volume method, details of which can be found in Patankar [27].

FLUENT software, which is a mature simulation software of computational fluid dynamics (CFD), can be used to simulation of the internal flow of jet.
The Numerical Simulation Process The purpose of numerical simulation is considered in order to obtain the vacuum in suction chamber with different structural parameters.
So the 2-D model was selected in numerical simulation to save calculation time.
We need build the model of different structural parameters in the numerical simulation process.
The Results and Analysis Numerical Simulation We select the primary geometrical model which structural parameters were length-diameter ratio was 9，area ratio was 2.56, distance between nozzle exit and inlet of throat was 1.25and the angle of diffusion tube was 3° to numerical simulation.

S1 refer to CFD surface area.
Effect simulation.
Simulation experiment analysis Simulation conditions.
Simulation time length is 5 days.
Simulation analysis of basic power-enhancing satellites.

Simulation of Temperature Field of Soil inside Drilling around a Vertically Buried Single-U-Tube Ground Heat Exchanger ZhenYu Du Taiyuan University of Technology, Taiyuan, 030024, China dsdd2004@163.com Key Words: Temperature field, Drilling, Single U-tube, Heat exchanger, Ground source heat pump.
Soil temperature numerical simulation around ground source heat pump buried tube in layered soil [Z].
Numerical simulation of U-tube heat exchanger with thermal and seepage coupling effect [J].
Computational fluid dynamics analysis-CFD software theory and application [M], Beijing: Tsinghua University Press, 2004.