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Tianjin, 300451, china a tianjialin@swpu.edu.cn (corresponding author), b liangz_2242@126.com, c ylin@swpu.edu.cn, d xqmei3@sina.com, e xsgsmqg@163.com Keywords: Downhole choke, throttle nozzle, numerical calculation, flow fluid, CFD Abstract.
Beside physical experiment test[4], Numerical simulation is the useful way analyzing two-dimensional and three-dimensional flow field current.
With careful comparison of research results and filed application test data, some results are not content with physical test values, so it is necessary to research on numerical calculation and simulation about it.
Lin Yang: Doctor of Southwest Petroleum University, Major in fluid dynamics numerical calculation and simulation.

By computer simulation techniques and some test methods, pedestrian wind speed around the buildings and air flow velocity could be determined.
In the design, by environmental CFD simulation and field trips, the location of the open space could be determined in order to avoid the formation of high speed wind.

Introduction The development of Lab-on-a-Chip-systems relies on the extensive use of computational fluid dynamics (CFD).
This study focus on a simple design and fabrication of microfluidic using capillary effect to support fluid flow across reacting assays with limited sample availability is proposed and the analysis was done using COMSOL 3.5 Multiphysics simulation to create minimum possible gap between microchamber and Lab on chip sensing elements.
Schönfeld CμFD Computational Micro Fluid Dynamics Basic Principles and Simulation, proceedings of the COMSOL Users Conference 2006 Frankfurt

The diameter of the channels is varied within the heat exchanger based upon the simulation results of uniformly sized channels of the heat exchanger.
The geometry is then exported to ICEM CFD which is a meshing tool.
Experimental setup and Validation Experimental studies are conducted on a cross flow heat exchanger (radiator of a Maruthi Omni) to validate the results obtained from the numerical simulation.

The FEM simulations using ABAQUS software is used to compute such approximations.
Interaction with fluid by using Computational Fluid Dynamics (CFD) on the structure response will significantly increase the validity of simulation to the real condition.
The simulation was getting the results to describe the elasticity of the material
The simulation purposed to have the basic response of module
The simulation purpose to obtain structure response for static load.

In order to overcome this situation, there are several reports on numerical simulations that attempted to explain the mechanism of SiC-CVD [2-5].
In this study, a numerical simulation was carried out on SiC-CVD in a horizontal hot-wall reactor.
Numerical simulation The horizontal hot-wall CVD reactor has been simplified in the 2D model.
The momentum, heat and mass transfer equations were analyzed using CFD-ACE+ commercially available software [6].
Figure 4 shows the relationship between the molar fraction of the surface silicon or the surface carbon at the center of the wafer obtained by numerical simulation and the experimentally obtained doping concentration on the Si-face and C-face, respectively.

The Numerical Simulation of Two-degrees-of-freedom Vortex-induced Vibrations of Circular Cylinder with High Mass-ratio Jie-Li Fan1, a, Wei-Ping Huang2,b 1Shandong Key Laboratory of Ocean Engineering, Ocean University of China, Qingdao 266100 2Shandong Key Laboratory of Ocean Engineering, Ocean University of China, Qingdao 266100 afanjieli1115@126.com,bwphuang@ouc.edu.cn Keywords: high mass-ratio, vortex-induced vibration, in-line VIV, cross-flow VIV, CFD Abstract.
The Numerical Simulation The fluid field uses the software-ICEM to mesh gridding.

The apparent viscosity of the Bingham model in the ANSYS simulation environment is mathematically defined as in Eq.(3).
Fig.6 Finite element model of the beam Simulation calculation.
For magnetic strengths of 0 Oe and 900 Oe, the procedure of simulation calculations is summarized as follows.
CFD simulation of magnetorheological fluid journal bearings.
Simulation Modelling Practice and Theory, 19 (2011): 1035~1060 [14] Anirban Ahaudhuri, Norman M.

There are known several methods for calculating and measuring of the aerodynamic variables – In-situ measurements, wind tunnel measurements, CFD simulations and calculations by national standards.
Compared to the other wind tunnels it is unique, because it has two test sections – the front and the back measuring space and thus it allows simulation of both uniform and turbulent flow.

D’Alessandro et al. [6] developed a new computational approach, based on both CFD and wind tunnel measurements, for the simulation of a drag-driven VAWT energy performance, in order to gain an insight into the complex flow field structures developing around a Savonius rotor.
D., Montelpare, S., Ricci, R., Secchiaroli, A., Unsteady Aerodynamics of a Savonius Wind Rotor: a new Computational Approach for the Simulation of Energy Performance, Energy, Vol. 35, Issue 8, August 2010, pp. 3349-3363