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Ltd, Hangzhou, China a zhangqunfeng@263.net Keywords: Hydro-generator; Temperature; Numerical simulation; Conjugate heat transfer Abstract.
Before this paper, the flow of dual radial ventilation system without fan for a hydro-generator has been simulated with parallel computational fluid dynamics (CFD).
Simulation Method Governing equations.
The hexahedral grids of different parts were generated with ICEM-CFD, the grids number of whole calculation domain is 1810,000.
Turbulence Modeling for CFD.

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).

,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.

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.

The Eulerian-Eulerian model equations have been implemented in the commercial Finite Volume Method based FLUENT-ANSYS v6.3 CFD software using User-Defined Functions (UDF).
This paper focuses on both the process and simulation parameters and their influence on the macrosegregation formation.
Results and discussion The solidification of a ternary steel ingot (X34Cr15) with a relatively small size (diameter: 66 mm, height: 170 mm) was set up for CFD simulations (see Table 1).
All properties and parameters used for the simulation are listed in Table 1.
The CFD simulations predict a chance of having smaller crystals flowing first downwards and then upwards.

This requires the computational fluid dynamics (CFD) approach be utilized.
In this work, the widely recognized CFD package CFX was used for the objective.
To use CFX to solve the CFD problem based on Eq. (1-4), the boundary conditions are considered.
Mizo: Three-dimensional numerical simulation of viscous flow around circular cylinder, Journal of Shanghai Jiaotong University, Vol. 35 (2001), No. 10, pp. 1464- 1469
Fletcher: Numerical simulations of gas flow patterns within a tall-form spray dryer, Chemical Engineering Research & Design, Vol. 79 (2001), No. 3, pp. 235-248

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.

The simulation results show that increasing the shaft speed in a certain range can reduce water film temperature, the effect is obvious especially at slow entrance velocity of bearings.
The British D.L.Cabrera et al. analyzed water lubricated rubber bearings’ inner pressure distribution through experiments and CFD software FIDAP, got that water lubricated rubber bearings work in mixed lubrication [3].
Based on basic hypothesis and boundary condition, the influence of different speeds on the temperature and pressure of water film is analyzed by applying CFD software FLUENT.
Conclusion In this paper, ship water lubricated stern bearing is taken as the research object, using FLUENT's preprocessor software GAMBIT to establish the CFD water lubricated rubber stern tube bearings model.
Method for thermal impedance calculation of water-cooled radiator based on CFD[J].

Numerical Simulation on Aerodynamically Generated Injection Nozzle Noise Jianping YU1, a, Hong Zhu2.b, Shuping Chen1, b and Xiaosen Zhang 1, c 1 School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou, China 2 Environmental resources Institute，Northwest Research Institute of Mining & Metallurgy ayujp@lut.cn, bzhh973201@163.com, cChengsp@lut.cn, dzhangxs@lut.cn Keywords: Numerical simulation, Injection Nozzle, CAA, Abstract.
Hence the results based on the CFD method are reliable and can be used to industrial applications.
The main purpose is verifying the accuracy of CAA theory model by comparing the simulation results and experiment data.
The comparation of noise between the simulated result and tested result :Fig.8 and Fig.9 shows the contours of noise which is calculated by numerical simulation.
Hence the results based on the CFD method are reliable and can be used to industrial applications.

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].