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Furthermore, a computational fluid dynamics (CFD) simulation will be implemented to predict the mass flow rate of the prototype fuel injector.
Computational Fluid Dynamics Simulation Modeling of the CNG Conduit.
FLUENT Simulation Results.
The purpose of the CFD simulation was to determine the mass flow rate of CNG at the pressure outlet of the fuel injector.
Table 2: Assumptions for CFD analysis.

Focus of the investigation was on an ammonia-water absorption chiller for medium temperature food refrigeration with cooling capacity 12.8 kW involving simulation on the modification of test facility using CFD-Fluent software (CFD = Computational Fluid Dynamics), numerical simulation of solar energy applied on the system, environmental impact and economical aspect analyses.
Simulation of a parabolic trough collector, only direct radiation was considered.
The value of this parameter was obtained from the CFD simulation of 1.81 GJ/day.
Another parameter is average daily amount of heat transfer fluid circulated to the chiller which has been calculated by using the optimum mass flow rate from CFD simulation of 0.9 kg/s (77,760 kg/day).
This temperature, simulated in CFD, was found to be 180oC.

Ref.[8] presented a solution for the optimization problem with CFD simulation, which can be alternatively implemented with the RSM and GA via the software modeFRONTIER.
The optimization is not directly performed with the real CFD simulation, but the Response Surface approximation instead.
Fig.1 CFD modeling of ESTP Cachan: (a) the aerial map of ESTP; (b) Parametric 3D CAD model; (c) CFD mesh model with results contour.
With this database, the Response Surface will be constructed to replace the real CFD simulation.
With the CFD model illustrated in Fig.1(c), the DOE stage took nearly 50 hours to finish all the simulations.

Coupled Wind-induced Vibration Analysis of the Membrane Structure Based on Steady-State CFD Xufeng Sun 1,a, Shirong Li 1,b 1Architectural Science and Engineering Institute, Yangzhou University, Yangzhou 225009, P.R.China axu_feng_sun@163.com, bsrli@yzu.edu.cn Keywords: membrane structure; coupled wind-induced vibration; CFD; aerodynamic damping; revision of the fluctuating wind velocity Abstract: Because of large flexibility and strong geometric nonlinearrity, the time domain method should be applied in the analysis of wind-induced vibration for the membrane structure, and the coupling effect between the structure and the fluid should also be considered.
In this problem, it is hard now to solve it directly using the technique of three-dimensional transient FSI based on CFD.
The general simulation of the fluctuating wind speed time function(e.g.
[5] Nozawa K, Tamura T: Large eddy simulation of the flow around a low-rise building immersed in a rough-wall turbulent boundary layer.
[7] Hargreaves D M, Wright N G: On the use of the k-ε model in commercial CFD software to model the neutral atmospheric boundary layer.

According to the development of a new type of oil purifier——HIGEE rotating oil purifier, this paper has carried out related numerical simulations.
This paper has carried out numerical simulation using CFD software——FLUENT.
Modeling flow through porous media and multiphase flow are two main respects in the numerical simulation.
a1)150g b1)150g a2)300g b2)300g c1)500g c2)500g Fig. 3 Numerical simulations of different accelerations of gravity: 1) Contour plot of the volume fraction of oil; 2) graph of the outlet volume fraction of oil Fig. 3 displays the numerical simulations of different accelerations of gravity.
Conclusion Two-phase porous medium flow model in the RPB was built, and by using CFD software——FLUENT the distribution of the phases in the RPB which is on different conditions has been simulated.

Research developed by the experimental research method with CFD simulation to meet the need for air changes.
This data will be used as input data in CFD simulation.
Simulation.
After the simulation between the openings and the design of the hybrid system is done, followed by extensive simulations with openings in various room volumes.
CFD simulation shows the condition of indoor air movement, ie the movement, distribution and velocity.

In this paper, CFD software is introduced to simulate the process of the flow of the spiral tube exchanger.
Simplified structure of the spiral tube Mathematical model The numerical simulation has been performed using CFD software and SIMPLE algorithm is adopted [9].
The standard turbulence model with standard wall functions is applied during the simulation.
Also, gravity effect is considered in the simulation[14].
Summary Through the application of the CFD software in this paper, analysis of the internal flow of the spiral tube exchanger is available.

Simulation on velocity field of gas-solid flow in the abrasive air jet nozzle was studied by the computed fluid dynamics(CFD) software.
With the development of computer technology and computed mathematics, the CFD software was developed.
But so far a little research on the simulation of abrasive air jet has been carried out and more attention has been paid to the simulation of abrasive water jet.
Mabrouki [2] have analyzed the interaction between the water jet and elastic-plastic material by CFD software.
The following are the two equations used by CFD software [4].

And a field test was conducted to confirm the simulation results.
The indoor temperature field, velocity field and PMV distribution with both original and reformed fan were simulated by CFD software and also a field test was conducted.
Computational Fluid Dynamics Simulation Physical Model.
Simulation and Analysis There are four simulation cases presented as shown in table 2 in this paper.
Vol. 56(2012), p. 419 [12] Fujun Wang: The computational fluid dynamics analysis– CFD software applications and principles (Tinghua University Press, Beijing 2004).

Numerical studies of reactive pollutant dispersion in urban street canyon are few in literatures compared with those simulations of passive pollutant. [13] introduced the simple photochemistry of NOO3-NO2 into a large-eddy simulation model and examined reactive pollutant dispersion in a street canyon. [14] examined reactive pollutant dispersion in an urban street with a street aspect ratio of one using a CFD model incorporating simple NONO2-O3 photochemistry.
Fig.2a shows that agreement between the numerical simulation and wind tunnel experiment results are overall good.
The validation suggested that the present CFD model may be used for simulating airflow and reactive pollutant dispersion in an urban street canyon with aspect ratio of one.
The concentration of NO is much greater on the leeward side than the windward side, and this is consistent with field measurements and simulation results with passive pollutant emissions.
The present CFD model incorporates simple photochemistry, but could be a prototype to develop a CFD model with complex chemical processes for basic and applied research with a wide range of practical applications to urban atmospheric environmental problems.