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Firstly, a three-dimensional model of the nozzle is established, then studied the detailed distribution of the inside and outside gas flow field when air is injected through the nozzle[3-5], which is simulated by CFD simulation software.
Numerical Simulation Simulation process.
CFD software-Fluent is used in this paper and turbulence model is chosen to calculate the result.
Simulation results and analysis.
Research at the aspect of pneumatic sand blasting mechanism and flow field characteristic based on CFD technique[D].

Based on sequentially coupled CFD and FEM models, aluminum alloy rolling ingot thermal stress simulations have been conducted in order to understand start-up phase cold cracking phenomena and optimize tooling designs for 520×2120 mm rolling ingot casting on Wagstaff® Epsilon™{TTP}8482 Ingot Tooling.
Shrinking of the water film ejection region from simulation as cast continues is presented in Figs. 4(a)-(c).
Ingot butt temperature history from the CFD model is presented in Fig. 6.
Figure 8: Computed butt curl development at ingot corner from FEM model simulation.
A significant amount of stress develops by ~1310mm (accumulated plastic strain is ~0.016, not shown) and is increasing when cast simulation is stopped.

Simulation software ATP is introduced, and the simulation results demonstrate that the proposed approach is feasible.
Compact Finite Difference (CFD).
Simulation results show that the fourth order accuracy can meet the engineering requirements.
Comparison of Over-voltage 1- the proposed algorithm; 2- simulation Fig.5 shows that the computational results of the proposed algorithm are almost consistent with simulation results.
Simulation of High-Speed Interconnects.

A gas-solid multiphase flow is simulated using CFD to investigate the fluid dynamics of a fluidized bed reactor.
Computational domain used for the simulation is shown in Fig. 1.
A grid size of 17700 is selected for the simulation by conducting grid sensitivity analysis.
K .Chatterjee, Effect of coefficient of restitution in Euler–Euler CFD simulation of fluidized-bed hydrodynamics, Particuology. 15 (2014) 170–177
Hassan Hashemabadi, CFD modeling of hydrodynamic and heat transfer in fluidized bed reactors, International Communications in Heat and Mass Transfer. 35 (2008) 357–368

Chip characterization and COMSOL CFD.
The characterization of chip depends on CFD and COMSOL CFD in this study.
Results and discussion COMSOL CFD result.
The simulation results are shown in Fig.4.
Fig .4 Result of COMSOL simulation.

Rotor Cooling System Design and Fluid Field Analysis of MW-Level High-Speed Permanent Magnet Motor ZHANG Feng-ge1,a, DU Guang-hui1,b, WANG Tian-yu2,c, HUANG Na1,d 1 School of Electrical Engineering, Shenyang University of Technology, 110870,China 2 College of Mechanical and Engineering, Shenyang Institute of Engineering, 110136,China a zhangfg@sut.edu.cn, b duguanghui1104@163.com, c lnwangtianyu@yahoo.com.cn,dhuangna125@163.com Keywords: high-speed motor; rotor ventilation system; 3D fluid field; CFD Abstract.
Due to ventilation structure of high power high-speed permanent magnet motor is complex and rotor cooling is difficult, the rotor cooling system was designed for a 1020kw 19000r/min high-speed permanent magnet motor and fluid field calculation model was established through the fluid flow CFD simulation software, and then the solving regional and boundary conditions of the 3D fluid field was determined.
In this paper, rotor cooling system was designed for a 1020kw 19000r/min high-speed permanent magnet motor and fluid field calculation was carried out through the fluid flow CFD simulation software.
Fluid Field Calculation Results and Analysis velocity/(m/s) velocity/(m/s) Fig.6 Fluid distribution of solving domain Fig.7 Fluid distribution of whole motor axial length/mm Fig.8 Fluid distribution of air gap velocity/(m/s) velocity /(m/s) axial length /m slot width /m Fig.9 3D velocity distribution of air gap Through the CFD-fluent software calculation the ventilation system fluid distribution is got.
Summary Due to MW-level high-speed permanent magnet motor rotor is hard to heat, rotor cooling ventilation system is designed for a high-speed permanent magnet motor of 1020kW, 19000r/min, and the 3D flow field model and simulation calculation are completed and fluid distribution in any position of the cooling ducts is got.

Continue the previous study, three dimensional CFD analyses has been conducted to optimize the design parameters and presented in this paper.
The width of the solar pannel chimney is 0.6m in the simulation.From the simulation, the effect of inclined chimney Thickness H1 on Flow Rate Q is plotted in Fig 5a.
Please notice that in this simulation H2 is fixed at 0.5m.
Please also notice that in this simulation H1 is fixed at 0.2m.
Model experiment and CFD Analysis on a solar assisted ventilation system.

The improvement method is presented by using Computational Fluid Dynamics (CFD) technology.
Flow field of the improved hydraulic unit is more uniform after the numerical simulation.
Numerical Simulation Modeling and Meshing.
Before (L) and after (R) improvement the hydraulic clack seat Optimization Design and Analysis According to the CFD simulation and analysis, the components are shown: (1) Fig. 6 is the suction valve disc; (2) the parameter of the hydraulic clack seat is improved.
The improved flow has been remodeled and carried out the CFD analysis.

For the thermal analysis, heat transfer coefficients on the surfaces of a rotor as functions of time are first estimated by CFD simulation, and then imported to a thermal analysis program as the boundary condition.
One way to study the brake squeal is finite element (FE) simulation.
For the thermal analysis, heat transfer coefficients on the surfaces of a rotor as functions of time are first estimated by CFD simulation, and they are imported to a thermal analysis program as the boundary condition, then the temperature distribution of the rotor can be obtained by finite element analysis.
The mesh of the fluid domain, which can be seen in Fig. 3(a), is then imported to ANSYS CFX Pre to define the boundary conditions and other settings essential for a successful CFD simulation.
In the thermal analysis, CFD simulation has shown that vortices will arise in the vented passages of straight-vent rotors, which means less heat carried away and lower heat transfer coefficients.

The simulation program ANSYS and its use in the simulation of a window.
Simulation program ,,ANSYS,, The simulation program ANSYS is becoming a leader in the field of computer simulations.
The program works with the finite element method (FEM) and finite volume method (FVM) with the support of CFD depending on the module used.
Fig. 3 Surface temperature fields and surface temperature Fig. 4 Geometry and material solutions Wooden window - the transfer of heat through conduction and convection Computer simulation was created in ANSYS with the support of CFD.
ISBN 978-80-254-0301-3 (in Slovak) [3] Palko, M.: CFD simulation with ANSYS, International Scientific Conference Ostrava 2007.