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Abstract: A 3-Dimensional fluid flow over the sudden expansion region of a horizontal duct for various Reynolds numbers have been studied by using the CFD Software package ANSYS Workbench Fluent v 13.0.
The simulation is carried out in sudden expansion for Reynolds number ranging from 200 to 4000.
The simulation is governed by continuity, momentum and energy equations.
Simulations of the flow and heat transfer are performed for the governing parameters, which are assigned with the following values: Prandtl number [6.99]; Reynolds number [200, 4000]; Heat flux [35 W/m2].
[3] Hiroyuki YOSHIKAWA, Kazuyoshi ICHINOMIYA, Mizue MUNEKATA and Hideki OHBA, Numerical Simulation of Deflecting Flow in a Symmetric Enlarged Channel, Journal of Thermal Science, Vol.16, No.4, pp 353-359, 2007

The commercial CFD (Computational Fluid Dynamics) ANSYS FLUENT V.16 was used to solve the system of equations.
Methods adopted in numerical simulations.
Numerical Simulation of Wave Flow over the Spiral-Reef Overtopping Device.
Simulation of irregular waves by CFD.
CFD Optimisation of an oscillating water column wave energy converter.

Therefore,it used fluid mechanics software Computational Fluid Dynamics(CFD) to simulate the flow and turbulence kinetic energy distribution of the fluid in reactor.
Reactor simulation grid unit was 493625 and node was 93158.
Numerical simulation area was consistent with structure and geometry size of the small scale reactor .
And it used Fluent6.3.26 software for numerical simulation.
Numerical simulation for the rectangular sedimentation tank by phoenics [ J].

Wind Energy Utilization of High-Rise Buildings Roof Numerical Analysis Yanhong Chen1,a, Xingqian Peng1,b, Rong Yang1,c 1College of Civil Engineering, Huaqiao University, Quanzhou, 362021, China ayanhongchen20@126.com, bpxq@hqu.edu.cn, c635701295@qq.com Keywords: high-rise building; wind energy; tower; wind speed ratio; numerical simulation Abstract: In order to improve the utilization of wind energy, set the tower on the roof, the roof tower on the use of CFD technology in different dimensions and different wind direction of the wind environment under the numerical analysis, simulate the velocity field around tower building, and comparative analysis, find out the reasonable fan placed to achieve the purpose to make full use of wind energy.
Fig.1 Schematic geometric model size Fig. 2 Wind direction signal Computational Model With IECM CFD 10.0 model to ANSYS CFX 10.0 software computing platforms.
Low door frame plant in the computational domain numerical simulation of wind tunnel setup [J].

Numerical Analysis of Concave-slab Type Water Lubricated Rubber Alloy Bearings’ Lubrication Jiaxu Wanga, Yanfeng Hanb, Guangwu Zhouc, Xiao Ked, Yi Qine and Song Wuf The State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400030, China ajxwang@cqu.edu.cn bfyh-0220@163.com czhouguangwu2004@163.com dxiaoke963@yahoo.com.cn eqinyi@cqu.edu.cn f16627326@qq.com Keywords: curve fitting, Concave-slab type water lubricated rubber alloy bearing, fluid-structure interactions, numerical simulation.
By using ADINA’s fluid-structure interactions solver, 2-D numerical simulation for the lubrication performance of Concave-slab type water lubricated rubber alloy bearing was carried out under low rotating speed conditions.
Then the pressure distribution, line load of the water lubricating film and the elastic deformation of slat-rubber lining were all obtained through the simulation.
The CFD results indicate that the maximum pressure zone in the bearing is close to the minimum clearance.

Flow Field Analysis of Pulse Converter Exhaust Manifold of Diesel Engines Wenjun Zhong1,a,Zhixia He2,b, Zhaochen Jiang, Yunlong Huang School of Energy Resource and Power Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu Province, China azhongwenjun1986@163.com, bzxhe@ujs.edu.cn Key words: diesel; flow field; exhaust manifold; unsteady flow; numerical simulation Abstract: A three-dimensional unsteady flow for the pulse converter exhaust manifold of 8-cylinder diesel engine was numerical simulated to get the flow characteristics of the exhaust manifold.
Simulation results show that there are strong eddy flows, low pressure closed recirculation flow region in the exhaust manifold.
Computer simulation of intake and exhaust manifold flow and heat transfer, 1986 SAE paper 860242
Computational fluid dynamics- theory and application of CFD program.

., Proseck´a 76, CZ-190 00 Prague 9, Czech Republic akral@itam.cas.cz, bpospisil@itam.cas.cz, Keywords: CFD, perforated surface, resistance barrier, wind effect, screen boundary condition.
On the other hand, the authentic simulation of the fluid mechanics requires specifying the relevant input parameters that can be determined by an experiment or by using a corresponding handbook.
The Computational Fluid Dynamics (CFD) represents a very powerful tool for such a deeper understanding the flow through perforated surfaces.
The resulting wind forces are determined using both the numerical simulation and the fluctuation increment: we = Cpe(x, y, z) · qp(z) = hp − nTn µ�ru + �ru�To ni+−h1 + 7Iv(z) i, (10) where Cpe(x, y, z) is the numerically calculated local aerodynamic coefficient, qp(z) is the peak velocity pressure at height z and Iv(z) is the turbulence intensity defined as the standard deviation ofthe turbulence divided by the mean wind velocity vm(z).
While the simulation gives results with the energy spectrum of turbulence up to the integral length scale characterized by a large flow velocity fluctuation and low in frequency, the turbulence intensity factor 7Iv(z) represents the short-term velocity fluctuations corresponding to eddies with intermediate scales.

Then a computational fluid dynamics (CFD) method is used to analyze the aerodynamic performance of this integrated configuration.
It is obvious that a well approximation between our simulation and ref.[6].
Fig.2 Cabin and cargo position of the BWB Fig.3 CFD mesh of the integrated configuration Fig.4 Lift coefficeint compared with ref.[6] Fig.5 Drag polar of each BWB mesh size Results and disscussion In this paper, aerodynamic performance of the integrated configuration in cruising and taking off are simulated and analyzed.
A structured grid code was used to generate the 3-D CFD mesh based on the integrated configuration geometry.

Numerical simulation on V shaped solar flat-plate air collector Mingdong Chen 1, a, Xuebing Liu1,b (corresponding author) 1 College of Architecture Engineering, Qingdao agricultural University, Qingdao, China amingdongjlu@126.com b xbliu@126.com Keywords: solar house; V-shaped solar flat-plate air collector; heat transfer model; collector height; collector layout Abstract.
Simulation model The V-shaped solar collector are made by metal mesh, the structure is shown in Fig.1.
The simulation model is established using the software of CFD, and the sketch of simulation grid is shown in Fig.2. 1. glass cover 2. absorber 3. air inlet 4. air outlet 5. metal mesh absorber Fig.1 The structure of V-shaped solar collector Fig.2 The sketch of simulation grid Result and analysis Energy balance equations.
In order to determine the relation between collector height and temperature change, the absorber temperature is seen a constant vale (340k) in the simulation model.
The simulation study is carried our when the absorber temperature are 320k，330k，340k，350k，360k and 370k.

Effect of expansion tube structure on regeneration of Diesel particulate filter Junchao Zhang1,a, Jiayi Du1,b and Daowei Ding1,c 1School of Automobile and Traffic Engineering, Jiangsu University, Zhenjiang, 212013, China azhangjc0801@126.com,bjydu@ujs.edu.cn,cjsdxddw@sina.com Key Words: expansion tube; diesel particulate filter; numerical simulation Abstract.
The regeneration process is simulated under the condition of different expansion tubes by the established model on CFD technology.
This paper adopts numerical simulation to study the regeneration process under the conditions of different expansion tubes to explore the effect of expansion tube structure parameters on DPF working process which provides a reference for the carrier structure design and optimization.
Numerical simulation of soot filtration and combustion within diesel particulate filters [J].