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Fig. 2 The CFD grids.
CFD Grid Generation and Calculation Models.
The CFD grids were achieved by the aid of FAME Engine Plus modular in the FIRE package.
Fig. 2 shows the CFD grids corresponding to 720 ºCA.
Numerical simulation.

The simulation results are verified through ground or field tests in the end.
CFD Analysis and Flow Control Precision CFD has been developed on the basis of the fluid dynamics theory and numerical simulation techniques.
Numerical simulation shows that the most serious particle impact erosion occurs at the pressure reducing valve port, some simulation results are presented in Table 2.
So the CFD method can make up for the bond-graph method in analyzing the influence of the local flow field.
Broenink: Simulation Practice and Theory, Vol.7 (1999), pp.481-492

For simulation of wind flow is used OpenFOAM software with k-epsilon model, which is in many papers represents as one of the best and most reasonable model for evaluation pedestrian comfort.
With CFD can be evaluate this problem very effective and not even time-consuming compared to wind tunnel experiment.
For calculations is used OpenFOAM, which is free, open CFD software.
CFD and turbulent flow Turbulence is the state of fluid motion that is characterized by apparently random and chaotic tree-dimensional vorticity.
"CFD - The open source CFD toolbox." from http://www.openfoam.com

The present work herein is the CFD simulation of throat pressure in venturi scrubber.
In this simulation, mean size of droplet 0.1 mm is taken.
Pressure at throat for different gas mass flow rate Conclusion CFD simulation of venturi scrubber is conducted for the study of hydrodynamics of gas-liquid in venturi scrubber by using Euler-Euler approach.
The simulation results show good agreement with experimental results.
Acknowledgements The author gratefully acknowledges the support of supervisor, CFD simulation Department of College of Nuclear Science and Technology, HEU and Gu HaiFeng team for experimental work.

The velocity fields obtained are compared with CFD simulations of the flow and allow the rigorous validation of numerical models.
The results obtained are compared with CFD simulations of the flow and allow the rigorous validation of numerical models.
Results and discussion PIV measurements are compared to computational results predicted by 2D axisymmetric simulations of the flow [2, 10].
This difference can be explained by the fact that the CFD simulations use a 2D axisymmetric stationary model which is unable to predict the instabilities caused by the interaction between the two primary and secondary flows.
Therefore, the PIV technique proves to be a very interesting tool for the validation of CFD simulations in supersonic ejectors.

Numerical simulations were carried out for different flow conditions.
Many studies have been done on the CFD analysis of droplet formation in a T-junction device [1-12].
Liu and Li [7] used a steady 3D two-fluid CFD model to study the dispersed bubbly flow split phenomenon in the T-junction.
The simulation achieved good agreement with the experimental result.
Conclusion This study used a CFD model to investigate the droplet generation process in the modified T-junction device proposed by Song [1].

The performance of a hydrodynamic journal bearing with different center circumferential grooves (CGs) is investigated using Computational fluid dynamics (CFD) simulation.
With the development of computer technology and numerical method, CFD simulation becomes available and popular in journal bearing investigation.
In the present work, a series of CFD simulations have been carried out to view the circumferential groove effects on journal bearing performance such as the oil flow rate, the load capacity, the friction torque and the maximum temperature, and try to discuss the mechanism of the influence.
CFD model for turbocharger journal bearing performances.
CFD analysis of journal bearing hydrodynamic lubrication by Binghamlubricant.

To verified the data from mechanical test, CFD simulation will be used.
In order to verified the result form mechanical tests, CFD simulation will be used.
In additon, CFD simulation was also used to demonstrate the gas flow around the superheater in the boiler.
CFD Modelling In the form of CFD modelling, the illustration of original combustion chamber is presented in Figure 1.
Fig. 1 Boiler Configuration It should be noted that CFD simulation are conducted at 100 % of capacity or design capacity [6,7].

The experimentally validated numerical tools, based on computational fluid dynamics(CFD), were proposed.
The simulated results and experimental data were in good correspondence, which verify the simulation methods are reasonable and the simulation results are acceptable.
Flow field computations were determined with the commercial CFD code FLUENT (version 6.3).
References [1] Xuesong Guo, Xin Zhou, Qiuwen Chen et al: Flow field and dissolved oxygen distributions in the outer channel of the Orbal oxidation ditch by monitor and CFD simulation[J].
[4] Fayolle Y, Cockx A, Gillot S, Roustan M, et al: Oxygen transfer prediction in aeration tanks using CFD[J].

Computational fluid dynamic (CFD) simulations of a small wind turbine with a simple frustum diffuser shrouding have been carried out.
The research presented in this paper parameterizes the power augmentation of a small wind turbine (AMPAIR 300) shrouded with a simple frustum diffuser, based on diffuser’s length and area ratio (outlet area/inlet area) using CFD simulations.
As can be seen the maximum Cp of the MWT obtained by CFD simulation is 13.8% achieved in l = 2.3 while in the DAMWT it is 19.5% and in l = 3, which means the performance has 41.3% increased.
Then simulations were done with these RPM and wind speeds.
Conclusion AMPAIR 300 wind turbine shrouded with different frustum diffuser shapes has been studied using CFD simulations.