Search results

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.

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.

Numerical Simulation of Unsteady Aerodynamic Loads over an Aircraft XiaoJun Xiang 1, a, Yu Qian1,b 1 Civil Aviation Flight University of China, Guanghan Sichuan 618307, China axj_xiang@126.com, bqianyucafuc@126.com Keywords: numerical simulation, unsteady flow, hysteresis effect, hysteresis loop Abstract.
CFD solvers have reached a level of robustness and maturity to allow routine use on relatively inexpensive computer clusters.
Model validate ONERA M6 wing is a standard wing for CFD to model validate in inviscid flow[5,6].
Badcock, Computation of Dynamic Derivatives Using CFD.AIAA paper.
AIAA-2010-4817 [2] Yu Qian,JunLi Yang,XiaoJun Xiang.Numerical Simulation of Unsteady Aerodynamic Loads over an Aerofoil in Transonic Flow.

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.

Simulation with software is one of the most important research methods.
Simulation based on ANSYS/FLUENT Structure.
Ma et al. [11] set up a 3D mathematical model of H2-air PEMFC and carried out simulations and performance optimization, by comparing the different cross sections and adjusting structure parameters of flow channel, based on computational fluid dynamics (CFD) software Fluent6.3 Gambit2.2.
The continuity, momentum, and energy equations are simultaneously solved by a general CFD code.
Cao: Computer Simulation Vol. 23 (2006), p. 204 (In Chinese) [25] H.S.

The results were used to validate the CFD results.
SST turbulence model was used and the simulation type was transient to capture the rotor fluid interaction more accurately.
The torque was calculated at each time-step at given RPM, and once the torque converged, the simulation was interupted and results were computed.
The results shows very good agreement between the experiment and CFD results.
The CFD results is underpredicted by aproximatly 6%, which means actual performance of the turbine will be 6% higher compared to CFD achived.

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.

In the analysis by CFD, the mesh size is 2 mm for one piece; the total mesh number is 125000 pieces.
From these simulations, the upper limit speed for flowing without fountain is confirmed.
In this paper, the pressing velocity is designed by the MPC simulation in offline.
Fig. 7: Weight function of qrate Control Input Design and Simulation.
We designed the controlled pressing velocity, by the MPC simulation in offline.

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.

Mixing Enhancement of a Passive Micromixer by Applying Boundary Protrusion Structures Chang-Yu HSIEH a , An-Shik YANG b Department of Energy and Refrigerating Air-Conditioning Engineering, National Taipei University of Technology, Taipei 106, Taiwan a t6458051@ntut.edu.tw, basyang@ntut.edu.tw Keywords: Microfluidics, micromixer, CFD simulations Abstract.
Simulation and measured results of the proposed micromixer demonstrated good mixing operations over a wide range of Re values (numerically: 0.1To simulate the inherently peculiar transport phenomenon inside a passive micromixer with geometrically complex design configuration, the commercial computational fluid dynamics (CFD) software ACE+® was used for conducting numerical calculations [5].
[3] Mengeaud V, Josserand J, Girault HH (2002) Mixing Processes in a Zigzag Microchannel: Finite Element Simulations and Optical Study.
[5] ESI US R&D 2004 CFD-ACE(U) ® V2004 User's Manual ESI-CFD Inc., Huntsville, AL.