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Today, with increasing maturity of CFD technique and computing power, one focus in numerical simulation of combustion is in the area of non-equilibrium chemistry and multiphase flow.
Therefore, CFD codes can serve as a powerful tool used to perform low cost parametric studies.
Geometry and Mesh Generation Grid generation represents a major challenge for CFD analysis.
The final unstructured grid that had 50000 cells was used in the simulation.
The ranges of the simulation values are: 10000W Q =& , 1.0 0.7, ,5.0=φ and 30% 20%, %,10=γ .

The Design and Analysis of Closed-coupled Exhaust Manifold Rangshu Xu 1, a, Xiangfeng Yan 2,b , Ling Niu 3 and Zhiwei Dong4 1 Shenyang Aerospace University, Shenyang, China, 110136 2 Shenyang Aerospace University, Shenyang, China, 110136 3 Shenyang Aerospace University, Shenyang, China, 110136 4 CNPC Jichai Power Equipment Company, Jinan, China, 250306 axurangshu@yahoo.com, byxfsdtc2010@163.com Keywords: exhaust gas; catalyst; numerical simulation; velocity distribution.
CFD method based on finite volume method is adopted to numerical simulate flow distribution in the entrance of closed-coupled catalytic converter and applying business software of FLUENT to clarity the flow uniformity of inlet to ensure catalytic converter work efficiently and meet regulations.
Yoshizawa, etc[1] through the comparison of experimental results and simulation results confirm the feasibility of computer simulation.
Soo-Jin Jeong[2] study inlet flow distribution of catalytic converter by CFD method to change the gap size distribution of catalytic converters in order to improve the conversion efficiency of catalytic converters.
In the studies the smoothly and uniformity of the internal combustion engine exhaust purification device by Xinghai Wang etc[3] and the flow field analysis and structural optimization of diesel engine exhaust manifold by Xianghua Li[11], CFD method were used to analysis the flow field.

This paper offers to watch the changes of flow profile within the column by the application of simulation software ANSYS CFX .Besides, according to the distribution of flow profile, the traditional column has been done a lot of dynamic simulation, especially the stigma part of the column.
The Simulation and optimization of fluid within chromatographic column.
As the boundary conditions of various parts are different, This paper uses software ICEM CFD to mesh and optimist the grid on the column, distributor, and some catheters [2], the grid sets relatively dense in the important part or the greater gradient part, and sparse in the unimportant part .
Summary (1) According to the simulation above, if the distributor’s design is improper, two conditions often occur.
Computational Fluid Dynamics-CFD software principles and applications.

The Application of Numerical Simulation Technology in the External Aerodynamic Noise Field of High-speed Train Zhengyu Zheng 1,2,a and Renxian Li 1,b 1 Chongqing University of Technology, Chongqing 400054, P.R.China 2 Southwest Jiaotong University, Chengdu, Sichuan Province 610031, P.R.China azhengzhengyu@126.com, brxli@home.swjtu.edu.cn Keywords: Vehicles-noise, Aeroacoustics, Lighthill-curle analogy, Large eddy simulation, Dipole source, Boundary element method Abstract.
This paper utilized the Boundary Element Method (BEM) combined with the Computational Fluid Dynamics (CFD) based on Lighthill’s analogy in the high-speed train model, and converted the fluctuating flow pressure near the vehicle’s surface into the dipole source boundary condition in acoustics grid, eventually succeeded in completing the numerical simulation of aerodynamic noise field outside the high-speed train by introducing the dipole source boundary condition into the train BEM model.
This paper utilized the Computational Aero-Acoustics (CAA) technology to the high-speed train flow model, and succeeded in getting the numerical simulation of aerodynamic noise field outside the high-speed train by introducing the dipole source boundary condition into the train’s BEM model.
Firstly, this paper utilizes the LES turbulence model in the CFD to simulate the external flow-field of the train at 270km/h, and obtain and export the fluctuating turbulence pressure data signals near the train’s surface meanwhile.
Fig. 11 Acoustics response at point01/02/03 (270km/h) Fig. 10 Acoustics response of point1/point2 (270km/h) Conclusions This paper utilizes the Boundary Element Method (BEM) combined with the Computational Fluid Dynamics (CFD) based on Lighthill’s analogy to the high-speed train flow model, and converts the fluctuating flow pressure near the vehicle’s surface into the dipole source boundary condition in acoustics grid, eventually succeeds in completing the numerical simulation of aerodynamic noise field outside the high-speed train by introducing the dipole source boundary condition into the train’s BEM model.

In the recent years, commercial computational fluid dynamics (CFD) software has become an important approach in the EGR cooler studies [3].
Basic background The CFD method was derived based on the fluid governing equations.
Simulation and verification Assumed Conditions.
Simulation.
The errors of the simulation results are less than 5%, which satisfy the requirement accuracy of numerical simulation.

In this paper, a sort of heat sink collocated with high-power IGBT module, which is commonly used in car-carrying motor control system, is designed based on thermal analysis by means of CFD simulation and computer-aided analyzing, also the influence relations of structure parameters with thermal performance are studied.
With the help of Computational Fluid Dynamics (CFD) software, thermal analysis and simulation for heat sink design become very convenient.
Computer aided engineering by CFD may improve the design results, and shorten the developing cycle obviously [3].
In order to examine the design result, thermal simulation and analysis for the designed heat sink are given to verify the thermal performance.
[3] Q.Y.Mei, Application of thermal simulation on the cooling of a phased array antenna, Electro-Mechanical Engineering. 23 (2007) 11-13

For the simulation and the modeling of a fire several approaches are available [3-4], the most accurate, but computationally expensive one, is the computational fluid dynamics (CFD).
In this sense, an initial attempt applied to steel structures was done by Zhang in [5] who used the results obtained from the CFD simulation in a pure thermo-mechanical solver.
In particular, for the structural analysis a set of boundary conditions will be calculated from the CFD simulation, including both heat and mass transfer.
Further developments in this research, will include a “two ways” coupling with which the results obtained from the FEM analysis of the solid domain will be used as boundary conditions for the CFD simulation.
Fig. 7: Stress YY distribution inside the slab after 1300 s of simulation.

ANSYS CFX software was used as the Computational Fluid Dynamic (CFD) simulation tool in this study.
Manufacturer’s Performance Data Sheet and Simulation Analysis at 8.0 l/s HBEP (m) PBEP (kW) ɳ (%) Manufacturer’s Data Sheet Simulation Results 14.00 13.37 1.70 1.45 65.00 72.42 Table 2.
The simulation performance curve yielded similar characteristics as the manufacturer’s data.
ANSYS CFX software was used as simulation tool to conduct the analysis.
Lakhera, "CFD for Centrifugal Pumps: A Review of the State-of-the-Art," Procedia Engineering, vol. 51, pp. 715-720, (2013)

To overcome this difficulty and predict the average pressure that the inner faces of the truncated cone, CFD techniques were used to simulate the same industrial conditions of hydrocyclones H23 and H24.
From the velocity and pressure profiles obtained by CFD techniques, it was numerically calculated mean pressures that internal walls were submitted (Eq. 4).
From the velocity and pressure profiles obtained by CFD techniques, it was numerically calculated mean pressures that internal walls were submitted (Eq. 4).
For registration purposes, the CFD simulations in hydrocyclones were two-dimensional, permanent and axis of symmetry.
RESULTS E DISCUSS Preliminarily, CFD simulations were performed in a condition commonly seen operating industrial hydrocyclones for H23 and H24 (−ΔPOA=257881 Pa and −ΔPOA=275351 Pa, respectively).

Using ANSYS-FLOTRAN CFD software, the finite element simulation is conducted by a series of procedures, such as two-dimensional model building of fluidic gyroscope, meshing, loads applying and equation solving.
In this paper, we use the FLOTRAN CFD analysis of ANSYS software to comparative study in the different position of vice nozzle, so as to attempt to find a better distance between vice nozzle and main nozzle which can improve the sensitivity of fluidic gyroscope.
Fig. 3 The nozzle array structure Fig. 4 Two-dimensional simplified models of sensitive cavity Solve with Finite Element Method The FLOTRAN CFD analysis of ANSYS software is an advanced tools used to study two dimensional and three dimensional flow fields, the simulation typically comprises modeling, loading and solving [3-4].
Select FLOTRAN CFD analysis of ANSYS software.
Wang: Numerical simulation of practical engineering in ANSYS (Northwestern Polytechnical University Press, China 1999)