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In this paper, CFD simulations of the wind environment of four typical urban spaces in Shenzhen are introduced.
The process and criteria of wind assessment based on CFD (Computational Fluid Dynamics) simulations using Airpak are shown.
In contrast with wind tunnel, CFD is cheaper and takes less time.
The accuracy of CFD for urban wind assessment is therefore acceptable.
Airpak with Fluent solver is used as simulation tool for the wind assessment.

CFD analysis of Heat transfer characteristics of Helical Coil Heat Exchangers R.
The simulation is carried out by keeping the cold water flow rate constant at 200 LPH (litre/h) and varying the hot water flow rate from 50 LPH to 200 LPH.
The results and contours are obtained from Ansys CFD Post.
This shows the conformity of the CFD results presented in this work.
The simulation results indicate that the heat transfer parameters like Nusselt number and heat transfer coefficient are higher for the helical tube in tube than the straight tube in tube.

Analysis of temperature field in an Oil-shale retorting furnace with gas heat carrier based on CFD BAI Jingru1, a , XIN Siyu1, b , WANG Qing1, c , QIN Hong1, d 1 School of Energy and Power Engineering，Northeast Dianli University，Jilin Jilin,China a bai630@mail.nedu.edu.cn , b syxinsyxin@sina.com , c rszx@mail.nedu.edu.cn, d qinhong01@163.com Key words：CFD; oil-shale; retorting furnace; temperature field Abstract.
In this paper, the temperature field in the accumulation body of nobby oil shale inside the retort area was simulated as porous media by CFD.
Fig. 1 Structural schematic map of experiment furnace Fig. 2 The mesh of this modeling Simulation Modeling.
Based on the trim size of gas retort, the geometric model is built, and gridded in the ICEM-CFD.
In their designing process, because of the large inside space, the influence by the side wall on the interior stack is smaller than that of the small gas retort, and the simulation outcome is more accurate.

In order to learn the entrainment mechanism of annular flow in OAL pipe, both experiment adopted observational method and numerical simulation used Computational Fluid Dynamic (CFD) were carried out.
The pipe diameter is 4mm and Volume of Fluid (VOF) model was used for two phase flow in simulation.
Alizadehdakhel[3] carried out experiments and CFD simulation in a 2cm diameter and 6m length tube of two-phase flow and pressure drop, both slug-to-annular flow and annular flow were discussed, the simulation results agreed with the results of experiment.
Numerical simulation CFD modeling The CFD software FLUENT 6.3 was used in this paper, and VOF model was employed which was widely used for two-phase free surface problems.
The k-ε (RNG) turbulence was used for turbulent flow simulation.

Consequently, 3D CFD simulations were conducted using ANSYS FLUENT 13.0 software, of which their results were compared with the experimental counterpart.
The comparison between the results of the developed CFD models and the experimental data showed very close agreement.
CFD simulations carried out for the predictions of flow pattern in bubble column reactors using 1D, 2D and 3D with k–ε models.
Cfd Simulations of Bubble Column Reactors: 1d, 2d and 3d Approach, Chemical Engineering Science. 60 (2005) 6733-6746
[7] Zhang, N., Lu, B., Wang, W. and Li, J. 3d Cfd Simulation of Hydrodynamics of a 50 Mwe Circulating Fluidized Bed Boiler, Chemical Engineering Journal. 162 (2010) 821-828

Precision compound sand control screen internal flow field of the CFD simulation Zhijian Wang1,a, Tianzhu Zhang1,b, Shang Jin2,c, Metsakeu Kong Evariste3,d 1School of Mechatronics Engineering, Aerospace University, Shenyang, Liaoning, 110000, China 2Jilin Shift Laser Technology Co., Ltd., Jilin, Jilin, 132000, China 3Msc mechanical engineering, Aerospace University, Shenyang, Liaoning, 110000, China awangzhijian1974@sina.com, btianzhu.zhang@jlshift.com, cjin.shang@jlshift.com devmetsa@yahoo.com Keywords: Sand control screen, Porous jump, Pressure loss, CFD Abstract.
In this paper, calculating fluid dynamics (CFD) method is utilized for analyzing the precision compound sand control screen internal flow field so as to establish appropriate models.
Aiming at these problems, the author used computational fluid (Fluent) simulation software to analyze the internal flow of sand control screen [2], and to provide theoretical support for the design and remodeling.
Besides the use of high-performance computer combined with computational fluid dynamics (CFD) simulation software for numerical simulation of the sieve tube fluid flow and to study its fluid flow pattern, sand trajectory, then to improve its internal structure, improve the sand control performance and flow resistance performance[3].
The screen is replaced with porous media jump surface in simulation, and friction parameters are acquired from handbooks based on various experiments.

Here we have used and compared Finite volume (CFD) and LBM numerical methods to simulate the flow over a cylinder in microscale CFD Simulation using ANSYS Fluent The investigation of the flow over a 2D cylinder is carried out by using the laminar model.
Literature Cd Cd obtained by CFD Cd obtained by LBM 5.67 (Dinesh) [7] (Poiseuille Flow) 5.31 5.52 3.43 (Tuann et al) [8] (Free Flow) 5.31 5.52 The reported data indicate that the values of the drag coefficients obtained from LBM and CFD simulation are very close to prior works results.
S D S/D CFD (ANSYS) LBM (MATLAB) %Difference CFD vs.
Simulation of flow around bluff bodies and bridge deck sections using CFD (Doctoral dissertation, University of Nottingham)
Choice of units in lattice Boltzmann simulations. 

Furthermore a 2-D CFD code has been used to perform a detailed analysis.
Numerical Method Based on the definition of flow model from [5.6 &13], the flow inside our model suited for the continued flow model which means the numerical method of solve N-S equation described in [8] is valid for simulation of flow and heat transfer in the research object. 1-D model and 2-D CFD model.
Fig.7, Fig.8 and Fig.9 show the temperature, pressure and the heat transfer rate across the diaphragm, respectively, over a cycle in the compression space as obtained from the 1-D Sage and 2-D CFD model simulations.
The maximum error of simulation result is less then 5% which will be accurately enough for engineering application.
The CFD simulations present a more realistic approach to the model.

Good correspondence is achieved in comparison with CFD simulation results for a zig-zag cooled power transformer winding.
Pressure Drop Correlations CFD simulations of single T-junctions and elbows are now performed to set up accurate pressure drop correlations.
CFD Simulations The ‘measured’ pressure drop is determined by CFD simulations.
Results are compared to those of the CFD simulation.
However, there is still a quantitative mismatch between the CFD simulation and the network model.

In this paper, Based on the research of CFD basic theory and several key technologies, the numerical model for solving three-dimensional flow field around the open water rudder is proposed.
The numerical results are compared with experimental results, showing that the CFD model which is proposed in this paper is suitable for computation of hydrodynamic forces and simulation of the viscous flow around the open water rudder.
Introduction At present, CFD is used widely to analyze the open water rudder’s hydrodynamic forces by engineers [1].
Table 1 Open water rudder numerical simulation test No.
Reynolds Test type Test method Simulation Purpose 1 1.82×106 Going straight ahead test.