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Simulation Analysis of Temperature Field of Permanent Magnet Governor Yanjie Wang1,a Sanping Zhou 2,b 1,2 Institute of Mechanical Engineering, Xi’an Shiyou University, Xi’an 710065, P.R.
The numerical simulation of fluid flow field and temperature field was carried out with the method of computational fluid dynamics (CFD) and ANSYS-Fluent software.
The numerical simulation of temperature field and flow field was carried out with the method of CFD and ANSYS-Fluent software.
By studying the distribution of flow field and temperature field, the structure was improved, and then conducted the numerical simulation on it.
The numerical simulation of improved model was conducted with the same method and steps, the velocity contours as shown in fig.6.

Due to the rapid progress of numerical techniques and computing capacity, the application of computational fluid dynamics (CFD) modelling to building fires has become increasingly widespread.
Heat and mass transfer, as well as the conservation of gas species and smoke particles, can be accurately computed using CFD models with high-quality meshing and a wide range of numerical models.
Consequently, numerical simulations based on CFD modelling are a cost-effective method for bridging the knowledge gap and investigating the system's sensitivity to certain parameters, such as gap widths and material thicknesses [14].
The excel contains data to analyse the simulation on material that has been created.
Results and Discussion TGA experimental and simulation comparison results In this section, a comparison result from simulation and experimental shall be shown.

With some footbridge as the research background, different wind pressure produced by different train speed acting on the bridge surface simulated by CFD method has been adopted to the bridge, thus influence of train speed on vibration responses of footbridge induced by wind due to main line train are obtained.
The relevant investigations on vibration responses, wind pressure simulation and measurement on adjacent buildings induced by high-speed train have been studied recent years and acquired flourish achievements [1-5].
The whole procedure of wind pressure acting on the bridge surface can be adopted by CFD methods which can be seen from literature [6].
Numerical simulation of aerodynamic characteristics of roof passing by high-speed railway train [J].
Simulation for Wind Pressure of Footbridge Induced by Main Line Train [J].

Sivasakthivel, CFD Analysis of Mixing and Combustion of a Hydrogen Fueled Scramjet Combustor with a Strut Injector by Using Fluent Software, International Journal of Engineering and Technology, Vol.3, pp.446-453 (2011)
Reddy K.K, Numerical Simulation of Wall Injection with Cavity in Supersonic Flows of Scramjet Combustion, International Journal of Soft Computing and Engineering, Vol.2, pp.142-150 (2012)
Radhakrishnan, Simulation of Unsteady Hypersonic Combustion around Projectiles in an Expansion Tube.
Roga, CFD Analysis of Scramjet Combustor with Non-Premixed Turbulence Model Using Ramp Injector, Applied Mechanics and Materials, Vol.555, pp.18-25, doi:10.4028/www.scientific.net/AMM.555.18 (2014)
Roga, CFD Analysis of Hypersonic Combustion of H2-Fueled Scramjet Combustor with Cavity Based Fuel Injector at Flight Mach 6, Scientific.Net, Applied Mechanics and Materials, Vol. 656, pp.53-63, doi:10.4028/www.scientific.net/AMM.656.53 (2014).

The numerical simulation of the three-dimensional flow and mixing in the metering zone was carried out for different screw configurations to determine the effect of the number of the small planetary-screws using CFD finite volume method technology.
In this paper, the numerical simulation was carried out for different configuration models of embedded planetary-screw extruder using finite volume method CFD(Computational Fluid Dynamics) technology.
A series of studies were in advance through experiments and numerical simulation methods.
Numerical simulation of flow in the metering region The CFD simulation of the metering zone was first carried out by finite volume method using the software FLUENT, where the small screws were simplified as the smooth cylinders with axial velocity.
Conclusions Numerical simulation was carried out to examine the different configurations of embedded planetary-screw by CFD technology method.

To study the effects of guide vane with different vane wrap angles and relative positions of outlet edge on hydraulic performance of nuclear reactor coolant pump, three-dimensional steady numerical simulations were performed by using CFD commercial software Numeca.
Numerical simulation is performed with the two key design parameters optimized through surrogate model, the internal flow field is improved and then the hydraulic efficiency is improved.
In view of this, the paper established the nuclear main pump model with different vane wrap angles and relative positions of outlet edge, and each model is simulated by using commercial CFD software NUMECA, which is widely used in the field of turbo-machine.
Table 2 shows that optimization result from the surrogate model is close to the CFD calculations one, so surrogate model can be considered to meet the requirements of the precision.
Finally, through numerical simulation, it verified the feasibility, rapidity and rationality of the surrogate model optimization method.

,Ltd,Ningbo Zhejiang,315103,China aliuhailin@mail.nbu.edu.cn, bdaishixun@nbu,edu.cn, Keywords: LED; Thermal Performance; Heat Sink; CFD .
Simulation results gotten by CFD software show that the pin-fin heat sink has better thermal performance with fin height of 40mm and fin number of 75.
In order to explore the effect of fin height on junction temperature, we change the fin height in simulation models, different junction temperature are observed.
Fixed fin height of 40mm and irradiation angle of 0°, and changing the fin number in the simulation models, different junction temperature are observed .As shown in Fig.4 the junction temperature decrease 28oC as the fin number increase form 20 to 110.
Exploring the thermal performance of pin-fin heat sink in different illumination angle, fixed the fin height of 40mm, and fin number of 75 in the simulation model, the junction temperature is increased only 4.1℃ by changing the irradiation angle from 0 to 90 as shown in Fig.6.

The original proposal of a Detached-Eddy Simulation (DES) initiated and inspired various hybrid turbulence modelling approaches, which seek to selectively treat regions of flow as either a Large-Eddy Simulation (LES) or a Reynolds-Averaged Navier-Stokes (RANS) [1, 2].
This was also used by previous investigations in work such as the development of open jet wind-tunnel boundary corrections, parametric studies analyzing the effects of ground simulation in wind-tunnels, experimental work validating CFD simulations and the investigation of dynamic yaw behaviour [3].
The time-step size was chosen based on the Courant-Friedrichs-Lewy (CFL) condition and all simulation results presented here used a CFL value of 0.8.
PIV results captured slightly higher velocities closer to the decklid compared to the CFD which provided better resolution in this region representing the interaction of the detached shear-layer and the recirculation in the wake.
Additionally, CFD results revealed a small region of lower velocity, similar to a subtle separation bubble midway along the backlight at the furthest longitudinal plane (y=-45).

Keywords: cylinder cage powder classifier; guide blades; numerical simulation.
The investigation of these flow field characteristics made use of the computational fluid dynamics (CFD) to simulate the air flow in the classifier.
The objective of this research is to compare particle separation performance of various guide vane angles, the CFD simulation can be effective to find out the difference of physical phenomena in cylinder cage powder classifier.
The selection of turbulence model for simulation calculation is very important.
Numerical research on cyclone separator’s separating efficiency model based on CFD [D]. wuxi:Jiangnan university,2008

In the numerical simulation research, turbulent two-phase flow calculations were performed with a commercial CFD computer code referred to as FLUENT to study the gas-solid two phase flow in the sections of backward-facing step and 90 degree bent pipe respectively by using Euler-Lagrange method.
The deviations between the simulations and experimental data lie in the range of 20%-30%.
These results suggest commercial CFD codes such as FLUENT can be used productively for investigations into gas-solid two-phase flow phenomena and as an aid in pneumatic conveying design.
Summary The results of this research and the comparison between simulation and experimental results are encouraging.
Further research should be devoted on the improving the numerical simulation to predict the nature of the two-phase flow more precisely.