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The research method for vehicle exhaust diffuse and transport rule include experimental, theoretical analysis and numerical simulation.
Wu and Bakar[2] by using CFD software to simulation the tunnel fire with different rectangular cross section of tunnel.
In this paper, the effect of double air extraction ventilation system to CO concentration distribution and diffuse rule in large tunnel be study by numerical simulation.
Numerical simulation for smoke flow of the tunnel fire.
The zone and numerical simulation on the tunnel fire.

Li[3] shows that the wind is particular spatial ambient flow by CFD simulation.
Zhang and Liu[4] analyses strong mean wind velocity and direction, by one-year field measured data and CFD.

The plume model used in the paper was simulated using a computation fluid dynamic (CFD) software package, FLUENT (Fluent, Inc.).
Compared with the static plume model, the simulated plume in CFD is more precise because the airflow velocity and odor concentrations are estimated throughout the space of interest [7].
Fig. 1 shows the dynamic CH4 plume model of two sources in simulation environment.
In the simulation experiment, we need to reproduce the plume model.
Lu, “A simulation framework for plume-tracing research,” Proceedings of ACRA.

Non-Isothermal Enhanced Recovery of Heavy Oils by Numerical Simulation A.
aactolimacunha@yahoo.com.br, bfariasn@deq.ufcg.edu.br, cgilson@dem.ufcg.edu.br, denivaldo.sb@gmail.com Key words: Heavy oil, flow, porous media, recovery factor, numerical simulation.
Results and Discussions Fig. 3 illustrates the mesh representing the study domain, which was crafted with the support of ICEM-CFD 11.0, this mesh was obtained after various refinements and resulted in a non structured mesh of 760.786 tetrahedral elements.
The simulations were performed on a Quad Core 2.66 GHz, 8 GB RAM and 1 TB physical memory (HD) computer.
The simulation time of the studied cases ranged from 43 to 46 hours.

The theoretical calculation and numerical simulation for the effective thermal conductivity of Li2TiO3 pebble bed are performed in this paper.
The results show that the effective thermal conductivity of Li2TiO3 pebble bed can be preliminarily obtained by numerical simulation and theoretical calculation.
But the construction of experimental apparatus for the pebble bed is still being planned and prepared now, so it might be a feasible way to theoretical calculate and model the thermal conductivity of pebble bed with the heat transfer law and CFD simulation.
Conclusion In this paper, theoretical equations and 3D numerical simulation model used to evaluate the effective thermal conduction of Li2TiO3 pebble bed were obtained.
Therefore, numerical simulation might be a more feasible way to assess the effective thermal conduction of Li2TiO3 pebble bed when there is no experimental data.

This paper presents results obtained from the application of a computational fluid dynamics (CFD) code Fluent 6.3 to modelling of temperature in propane flames with air preheat.
Both experimental works and numerical simulation showed that increasing the temperature of the combustion air significantly increases the flame temperature.
In this paper, the application of PDF and EDM combustion modelling approach to the simulation of turbulent non-premixed propane flames with air preheat is presented.
Although Hjertager et al. [9] reported that the standard EDM model is not suitable for liquid-phase reactions; it has found extensive application in the simulation of turbulent reacting flows.
Solberg: CFD Modelling of Fast Chemical Reactions in Turbulent Liquid Flows, Computers and Chemical Engineering Vol. 26 (2002), p. 507-515 [9] I.R.

Zhang[5] has studied the heading control of AUV using ADRC with the semi-physical simulation, and Yan[6] has researched path following control of AUV using SVR-ADRC.
The depth model of AUV The simulations used in this paper adopt a nonlinear 6 degrees of freedom (DOF) model to give a representation of the real system as accurate as possible.
To achieve a precise depth model, the hydrodynamic coefficients are usually obtained through tow-tank experiments or by employing computational fluid dynamics (CFD) tools in a general way.
However, the effective load of AUV and hydrodynamics could be affected by the frequently changed mission requirement, which limits the achievement of parameters by the experiment time, expensive tow-tank experiments or CFD simulations.
Journal of Applied Mathematics, 2014, [7] Timothy Prestreo.Verification of a Six-Degree of Freedom Simulation Model for the REMUS Autonomous Underwater Vehicle:[D].Massachusetts Institute Of Technology and the Woods Hole Oceanographic Institution,2001 [8] Fossen T.

CFD based multiphase numerical analyses were carried out using a finite element based technique [7], where fluid flow was simulated by using the Navier Stokes equations
The numerical simulations were carried out at the operating and geometric conditions specified in Table 1.
Operating conditions used for the simulations.
Hearty, The Icing of anunheated, Non-rotating Cylinder, Part I: A Simulation Model, J.
[7] http://www.newmerical.com/index.php/products/fensap-ice-cfd-software/

This situation is coming easier with existing powerful simulating system CFD (it is based on the basic hydraulic equations with a finite element method use).
Thanks to the wide system of computing hydrodynamics (CFD) we have received possibility to decrease simulation time (in comparison with the classic principle) of the flow part.
With the help of existing pump design analyze, considering user requirements, and using up-to-date software for simulation and strength calculations the curves families of standard pumps was renewed.

CFD simulation technology was applied to optimize the fluid field of the multi-stage centrifugal pump, and then the velocity, pressure fluctuation and fluid excitation were concerned to investigate the effect of optimization.
There are two methods, experiment [2] and numerical simulation [3], to study the unsteady pressure pulsation.