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This method is error-prone and ineffective, and cannot satisfy CAD/CAM integration and CFD analysis of impellers.
Chang-ming Yang [2] has proposed a method for calculating coordinates of points on vane surfaces, and achieved CFD simulation in centrifugal pump vane.
The vane and impeller solid model can be obtained rapidly, which set the stage for further finite-element analysis, CFD analysis, and CAD/CAM integration of impeller, etc.

Initial studies were performed using CFD (ANSYS / Fluid Dynamics).
Finally, the 3-D stall barrier was mounted on a complete model rotor blade and investigated by means of a numerical flow simulation.
Figure 8: Velocity distribution in the cross-section of the stall barrier with flow channel The CFD analysis has shown that the following design parameters have a significant effect on the efficiency of a stall barrier with suction (Fig. 8): • Height of the channel compared to the maximum profile thickness • The "dead water area" in the intake depends on the inlet inclination relative to the free flow of the profile shape and the inner channel form (height, etc
The future flow simulations should also be calculated in transient mode in order to obtain a more accurate result.
References [1] Wittig, S.: Numerical flow simulation of a horizontal axis wind turbine (HAWT) rotor to investigate the potential of improving the operating performance under use of different aerodynamic modifications, cp.max Rotortechnik GmbH & Co.

This research used CFD softwares to simulate the downforce generated with the airfoil set to different height, and also analyzed the difference on the downforce when the airfoil is set on the racing car.
Numerical Simulation Turbulence Model.
Simulation Model.
The results of numerical simulation and wind tunnel test were qualitatively the same in overall trend.
The analysis provided not only references for the accuracy of improving simulation result, but also important data to support for whole car dynamics simulation.

Numerical simulation.
The numerical simulation was performed using FLUENT, a commercial computational fluid dynamics (CFD) code, to compare simulation results to the test data.
Simulation model Fig.1 shows the dimensions of one heat regenerator used in a HiTAC regenerative burner.
Fig.1 shows the three-dimensional zone in the simulation.
In this study, all residual errors of the degree of freedom were set by , which is satisfactory for simulation analysis.

This paper uses the simulation technology of computer numerical simulation, combined with the GAMBIT numerical modeling software and ANSYS structure analysis software, we carry out an in-depth research and analysis on the stability of engineering simulation, at the same times establish the mathematical model of ANSYS numerical simulation displacement stability and design the ANSYS command stream program algorithm.
Through the numerical simulation, we get the displacement of slope in the Y direction and Z direction.
The numerical simulation provides the theory reference for the safety of mining engineering.
So in future studies, we should consider the actual model of the mine and the numerical simulation under the complicated stress conditions, so as to achieve the higher simulation accuracy values.
Numerical simulation technology based on ANSYS ICEM CFD and CFX [J].

Kim (2004)[7] tackled CFD modeling of realistic 4×4 and 5×5 fuel rod channels, showing the power spectrum of the flow.
This was followed by a detailed, fundamental validation of CFD for calculating the forces on a tube in high Reynolds number cross-flow using LES by Kim and Mohan (2005)[8].
In order to easy simulation, if the outer fliud radius is appropriate, the inner fluid can be considered as the additional mass.
Numerical simulation of cross flow induced fluidelastic vibration of tube arrays and comparison with experimental results.
Prediction of unsteady loading on a circular cylinder in high Reynolds number flows using Large Eddy Simulation.

The fluid used in the simulation is air, at temperatures of 300 to 700 K, and is treated to be incompressible, at the inlet face of the tube with an inlet velocity of 0.264 m/s.
Fig.2.Temperature and Fig.3 Velocity conturesCFD profile Conclusions Flow fields inside a circular tube have been studied numerically using a CFD code to optimize the fin shape for batter heat transfer enhancement.
The CFD approach with schemes used in this study is to simulate the flow pattern inside the circular tube which is attached with fin internally.
Sarangi, Influence of Porosity on the Performance of a Pulse Tube Refrigerator: A CFD Study.

Based on the numerical simulation of the three-dimensional flow field in blade channel,the aerodynamic loadand the stressstrain of the blade can be more accurately obtained.
Pressure distributions around the surfaces of main blade and splitter blade are calculated through CFX.Then the data will be delivered to the Static Structure module in ANSYS/ workbench using the interface between CFX and ANSYS.Load data is transferred from CFD mesh nodes to an ANSYS structure mesh nodes;the mapped forces on the blades surface are almost equal to the computed forces from CFD results.
What’s more,Load Transfer Summary shows thatabout 98% of mechanical nodes were mapped to the CFD surface, and the remaining nodes are mapped to the closest edge or node.

Research Methods FDS+EVAC is a computational fluid dynamics (CFD) software codeveloped by the United States National Institute of Standards and Technology and the VTT Technical Research Centre of Finland.
The simulation case design is shown in Table 2.
Simulation case design Case No.
Evacuation simulation for the base case Table 3.
(Yan) Chen,“Numerical determination and treatment of convective heat transfer coefficient in the coupled building energy and CFD simulation ,” Building and Environment, pp.1001-1009,2005

Numerical simulation of flow field inside the cyclone separator has rarely been involved.
Therefore, numeral simulation of flow field inside the cyclone separator used in small-sized VRF system is necessary.
Further study of the simulation result shows that the pressure loss of S is smaller than B.
[3] Hua Zhou, Application of CFD in the modification of an oil-gas separator design, Hydrodynamics investigation and development, 2004, A(19): 926-929
[4] Guo Jiang, Application of CFD technique in design and selection of oil and gas separator.