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It focused the effect on the numerical simulation for bending-span ratio.
In order to solve this problem, based on numerical wind tunnel method has the advantages of low cost, fast speed, the results collecting more comprehensive advantages, this paper using CFD knowledge, using the FLUENT software, using RNG turbulence model, simulating a landform, have numerical simulation of the average wind pressure coefficient of the rhombic plane saddle roof.
CFD NUMERICAL SIMULATION Mathematical models (Control equations ).Control equation In Reference(Wang2004).
In this paper, the numerical simulation selected RNG- model.
[4] Wang, F.J..Computational fluid dynamics analysis of CFD software theory and application [ M].

CFD Simulation of Airflow Organization in the Ship Accommodation Kun Zhang 1, a, Haixu Li 2,b , Jinling Wang 1,c 1Harbin Engineering University, Harbin150001, China 2Systems Engineering Research Institute, Beijing100094, China a zhangkunzk00@163.com,b haixu2000@126.com ,cwangjinling07@163.com Keywords: indoor air quality (IAQ); numerical simulation; air conditioning; airflow organization; temperature fields; velocity fields; air age fields Abstract.
Currently, in the HVAV field, CFD is mainly applied in land air conditioning system while in the ship air conditioning system CFD study has not been universal.
And it tries to explore the main factors that impact accommodation airflow distribution and IAQ through CFD.
Numerical simulation about air-flow organization of the influence on the indoor air quality.
Research on numerical simulation of airflow organization of ship living cabin.

Numerical Simulation Research of An Ultra-micro Dispensing XU Ce1, a, ZHANG Qin1,b , Huang Weijun1,c and AOYAMA Hisayuki2,d 1 School of Mechanical & Automotive Engineering, South China University of Technology, Guangzhou 510641, China 2 Department of Mechanical Engineering & Intelligent Systems, University of Electro-Communications, Tokyo 182-8585, Japan axucescau2007@163.com, bzhangqin@scut.edu.cn, c huangwj@scut.edu.cn, daoyama@mce.uec.ac.jp Keywords: Ultra-micro dispensing, Micro-fluid, CFD simulation, Experimental verification Abstract.
A micro-fluid dynamics model is built using CFD (Computational Fluid Dynamics) software Fluent14.0 program, and the working process is dynamically simulated based on the model.
Therefore the numerical simulation with commercial CFD (computational fluid mechanics) software is a candidate approach to study the ultra-micro dispensing.
Numerical Simulation Governing Equations.
The axisymmetric grid model is built in GAMBIT software, and then imported into the CFD software Fluent14.0 program to for numerical computation.

Impact of vane curve on hydraulic performance of the DQ100-64-22 stamping pump was researched by CFD simulation and experiments.
Blade type models was established based on DQ100-64-22 stamping and welding multistage pumps to investigate impact of blade type on flow field and hydraulic of centrifugal pump according to CFD simulation and experiment results.
After mesh generation and boundary condition definition were conducted, the CFD numerical simulation work would be carried out by fluent software.
When the CFD numerical simulation conducted with fluent, turbulence was simulated by means of the realizable κ-ε model.
Experimental Results In order to check the accuracy of CFD simulation results, the fillet blade scheme was tested by experiment research.

Comparative study on external flow simulation of passenger car with complex underbody and flat underbody Yan Xu1, a, Qiao Xin1, b, Zhao Zhiming1, c, Ye Jian1, d, Liao Lei2, e, Hu Xingjun2,f and Wang Jingyu2,g 1Changan Auto Global R&D Center, Chongqing 401120, China 2State Key Lab of Automobile Simulation and Control, Jilin University, Changchun 130022, China ayx291215@163.com, b22430161@qq.com, ccfdzhaozm@163.com, dcatia420@yahoo.com, eaillieo@163.com, fhxj@jlu.edu.cn, gwangjy@jlu.edu.cn Keywords: comparative study, complex underbody, external flow, automobile aerodynamics, CFD Abstract.
Introduction With the development of computer technology and CFD, increasing numerical simulations of external flow of vehicles have been applied to automotive aerodynamics.
Vehicles have complicated underbody structures and if all the details are kept in the CFD simulation, grid quantity will be largely increased and may even cause other new problems.
Consequently, it’s necessary to simplify the complicated underbody structure in the pre-process of CFD, which will increase the efficiency and realizability of flow field simulation.
Numerical Simulation Geometric model and domain.

In this paper, based on fluid dynamics software CFD and criteria Reynolds k-ε turbulence model, wind field of the village flat roof with parapet is studied using the numerical simulation technology.
CFD turbulence models currently include Spalart-Allmaras model, k-ε model, k-ω model, the Reynolds stress model (RSM), large eddy simulation model (LES), etc, of which the standard k-ε model is proposed by the Launder and Spalding.
Therefore, a numerical simulation is conducted on the wind field of a flat roof with parapet using CFD software fluent 6.3, in which criteria Reynolds k-ε turbulence model is selected, and the wind pressure data in different wind angles is processed and analyzed.
Numerical Simulation Standard k-ε model.
Near-field pollutant dispersion in the built environment by CFD and wind tunnel simulations[J].

Aerodynamic Numerical Simulation in the Process of Car Styling Yingchao Zhang1,2,a, Zhe Zhang 1,2,b, Shuanghu Luo2 and Jianhua Tian2 1 State Key Laboratory of Automobile Dynamic Simulation, Jilin University, Changchun, China, 130022 2 College of Automotive Engineering, Jilin University, Changchun, China, 130022 a yingchao@jlu.edu.cn, bZhangzhejlu@tom.com Keywords: Aerodynamics, Computational fluid dynamics (CFD), Car body shape, Car styling virtual, Wind tunnel Abstract.
Some automotive aerodynamic numerical simulation based CFD is introduced in this paper named virtual wind tunnel test.
All the cells name meshes were export to CFD solve code.
It is a simple, effective, convenient and fast way to do aerodynamic nermerical simulation based CFD in the process of car styling.
Gao: Research on Local Parameterization Modeling of Concept Car Body and CFD Simulation (Ph.D., Jilin University, China 2008) (in Chinese)

Performance Enhancement of a Small Centrifugal Cooling Fan Sheam-Chyun Lina, Cheng-Ju Changb and Ming-Yuan Hsiehc Department of Mechanical Engineering National Taiwan University of Science and Technology 43, Sec. 4, Keelung Road, Taipei, Taiwan 10672, ROC asclynn@mail.ntust.edu.tw, bd9603301@mail.ntust.edu.tw, cd9403607@mail.ntust.edu.tw Keywords: Centrifugal fan, Aerodynamics, Acoustics, CFD simulation, AMCA chamber.
CFD and Experimental Schemes Numerical Scheme.
Advance to simulation the flow field in the centrifugal fan after getting the best combination.
The deviation between simulations and experiments were less than 10%.
The improved impeller performances on the B2 and B3 design are identified from both the CFD and experimental results. 2.

Numerical simulation on aerodynamic characteristics of road vehicles on bridges under cross winds Y.
(a) The cross section of the Yichang Suspension Bridge (b) The vehicle model Fig. 1 Model geometry and overall dimensions (Unit: cm) Numerical simulation The present analysis is performed using a commercial CFD solver ANSYS CFX12.
Simulation method.
Simulations are calculated with a constant wind speed of 20 m/s.
A summary of the simulation conditions for each case is shown in Table 1.

Two equation models make a bulk of turbulence models used for CFD simulations.
Results and Discussion The results of CFD simulation shows typical fluid dynamics prediction in the perforated rotating bucket, where the fluid is forced to move the orifices at the bucket wall.
Velocity profiles at each plane is analyzed by CFD simulation.
(d) (c) (b) (a) Fig. 3 Velocity profile on different planes along horizontal axis Fig. 4 The average velocity at each orifice position by CFD simulation Conclusions In commercial application of perforated rotating bucket, velocity profile is very important for the design aspects or during operations.
Alamdari, Simulation of urea prilling process: An industrial case study.