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The current CFD models have been validated by the experimental data obtained from the boiler for case study.
Numerical Simulations A computational fluid dynamics (CFD) program was used to perform the simulations.
Nguyen, T.D., et al., Application of urea-based SNCR to a municipal incinerator: On-site test and CFD simulation.
Skjoth-Rasmunssen, et al., Post-processing of detailed chemical kinetic mechanisms onto CFD simulations, Comput.
Chacon, et al., Investigation on the design and optimization of a low NOX-CO emission burner both experimentally and through computational fluid dynamics (CFD) simulations, Energy Fuel 21 (2007) 42–58

CFD Numerical Simulation The three-dimensional models of stator and rotor of hydrodynamic retarder D300 are shown in figure 1 [5].
Fig.2 Computational model of full port Fig.3 Mesh model of full port Because of the complexity of internal flow field of hydrodynamic retarder, the assumptions of CFD numerical simulation are needed.
It can be seen from CFD numerical simulation that the internal temperature distributions in the working conditions of liquid-filled ratios of 25%, 50% and 75% are similar to the temperature distribution in the working condition of all filling liquid.
Conclusion The temperature fields of different filling ratios use CFD numerical simulation of three-dimensional unsteady flow through constructing three-dimensional geometric model of the hydrodynamic retarder D300.
The conclusion is that the CFD-based numerical simulation method is comparatively accurate to represent internal temperature field of the hydrodynamic retarder.

CFD numerical simulation Fig.1 Three-dimensional full-port model The computational domain was composed of spiral case, guide vane, runner and draft tube.
The total pressure distributions of runner are shown as Figure 2, and the results of CFD numerical simulation are listed in Table 4.
In load shedding conditions, the maximum error between improved formula and CFD numerical simulation is 7.18% (condition number 7) and the minimum error is 2.68%(condition number 8).
Meanwhile, another method was used to made comparative analysis and it was CFD numerical simulation.
Compared with the CFD numerical simulation, improved formula is simple in computation and closely combined with parameters like flow, head and speed.

Simulation software ATP is introduced, and the simulation results demonstrate that the proposed approach is feasible.
Compact Finite Difference (CFD).
Simulation results show that the fourth order accuracy can meet the engineering requirements.
Comparison of Over-voltage 1- the proposed algorithm; 2- simulation Fig.5 shows that the computational results of the proposed algorithm are almost consistent with simulation results.
Simulation of High-Speed Interconnects.

In the analysis by CFD, the mesh size is 2 mm for one piece; the total mesh number is 125000 pieces.
From these simulations, the upper limit speed for flowing without fountain is confirmed.
In this paper, the pressing velocity is designed by the MPC simulation in offline.
Fig. 7: Weight function of qrate Control Input Design and Simulation.
We designed the controlled pressing velocity, by the MPC simulation in offline.

CFD Simulation Analysis on Fire Feature of Tunnel with Different Sections of Smoke Outlet Beihua Conga, Xin Hanb and Jun Linc Shanghai Institute of Disaster Prevention and Relief, Tongji University, Shanghai 200092, China Tongji Antai R&D Center of Engineering Disaster Prevention, Shanghai 200032, China abhcong@tongji.edu.cn, bhanxin@tongji.edu.cn, clinjun@tongji.edu.cn Keywords: road tunnel fire, smoke outlet, smoke extraction system, FDS simulation Abstract.
In order to further understand the fire smoke feature affected by different sections of smoke outlet in road tunnel and bring forward some reference on section selection of smoke outlet, this paper carried out CFD simulation analysis on fire feature of a certain large scale cross-section road tunnel with different sections of smoke outlet.
Numerical Simulation Physical Model.
The simulation model of the tunnel is shown in Fig. 1.
Conclusion Though the analysis of numerical simulation results, some brief conclusion could be achieved.

And the method of CFD simulation and theory will be a reference for relevant research.
With the developing of CFD software, nowadays we can do researches and analysis in virtual.
Therefore, in commen CFD engineering software, the reynolds stress model is always simplified such as two equations model.
Simulation Calculation Establishing 3D model.
So, Hex gird does much better accuricy in both delivering vector load and fluid simulation.

The Numerical Simulation on Diesel Particulate Filter Based on CFD Technology Guoliang Hua, Fei Dongb, Xi Yangc and Yunpeng Dud* School of Automobile and Traffic Engineering, Jiangsu University, Zhenjiang, 212013, China ahuguoliang668@sohu.com bjsdxdf@163.com chandsome_yang@yeah.net d,*Corresponding author, jsdxdyp@163.com KEY WORDS: Diesel engine, DPF, Soot particulate, Simulation Abstract.
In this process, the internal parameter settings of the DPF simulation was described in detail, while the simulation results was obtained by analysis.
The research of DPF simulation mainly stayed on the stage of model improvement and method optimization.
After finishing the whole simulation, the changing process of DPF temperature field was determined.
[5] AVL, Fire, CFD Solver, 2008

The aim of the research work described in this paper is to use computational fluid dynamics (CFD) to optimize the geometry of a multi-stage evaporative cooling device to investigate the effects on its performance by varying the primary inlet to mixing st ack area ratio.
The overall purpose of the research work of which the present study is a part, is to use computational fluid dynamics (CFD) to optimize the geometry of a multi-stage evaporative cooling device.
Figure 3- Volume mesh The simulation was carried out as a steady-state analysis.
Results from initial simulation Contour plots showing the temperature and relative humidity on the YZ plane, and at the mixing stack outlet are shown in Figure 4 YZ-plane Mixing stack outlet Figure 4-Temperature and Relative Humidity It can be seen from Figure 4 that a significant reduction in the temperature of the incoming air was achieved in the initial simulation.
Applying the the outlet humidity ratio W4 = 0.0090 kg/kg obtained from the simulation summary, the rate of evaporation was calculated to be 0.085 kg/s.

CFD Model Set up In the simulation, the two dimension(2-D) axisymmetric model is applied which results are very closed to the 3-D model [3].
Validation of CFD Simulation The entrainment ratio of experimental data from Chunnanond[1] along steam-jet pump at different geometries of primary nozzle is shown in Table 1.
At the same time, the simulation results of this investigation are also to be list in the table.
The results of CFD were also validated with experimental data provided by others[7].
CFD method has been used successfully to simulate and capture the flow phenomena in steam-jet pump.