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The study shows that using FLUENT simulation results to predict performance of hub cutter is feasible.
Over the past few years, with the rapid development of the computer technology, Computational Fluid Dynamics (CFD) has been developed to becoming popular software to analyze the operation of devices under the water both in home and abroad.
Nowadays, common used CFD applications are FLUENT, PHOENICS, FIDAP, CFX.
Fig.5 Turbo report Conclusion We have proposed a fluid model for numerical simulation of aquatics hub cutter with a realizable RNG turbulence mode1 in FLUENT software.
CFD can help to predict the pressure on the surface of aquatics hub cutter.

two-phase flow by CFD software FLUENT.
The simulation results show that the furnace can accelerate the flow of quenching media, which can cool specimen quickly.
(4) The relationship of excursion velocity and relative velocity is: (5) 3 Numerical Simulation Process and Results The numerical simulation is performed by CFD software FLUENT 6.3.
Therefore the flow field is analyzed with turbulent model, and the standard k-ε model is used in the numerical simulation.
During simulation, Nitrogen is the main phase, and spray water is the second phase, which is supposed as droplet with 0.05mm diameter.

Numerical Simulation of The Flow and Heat Transfer of Fractal Tree-like Minichannel Heat Exchanger Sun Jian,Huang Zhangfeng,Zhang Renping School of Material Science and Engineering,Jingdezhen Ceramic Institute,Jingdezhen,China ajian933@163.com Keywords: Tree-like minichannel; heat transfer;fluid flow Abstract.
A three-dimensional steady-state laminar flow and heat transfer model for fractal tree-like minichannel heat exchanger is developed.The fluid flow and heat transfer process is studied by CFD software.
Fig.1 3D model of minichannel heat exchanger Table.1 Fractal tree-like channel size k Lk/mm dk/mm hk/mm wk/mm 1 2 3 4 5 6 7 40.00 28.28 20.00 14.14 10.00 7.07 5.00 3.20 2.54 2.01 1.60 1.27 1.00 0.80 2.4 2.4 2.4 2.4 2.4 2.4 2.4 4.80 2.69 1.73 1.20 0.86 0.63 0.48 Fig.2 Top structure of the heat exchanger Fig.3 Bottom structure of the heat exchanger Calculated result and analysis (c) Temperature distribution of bottom surface (c) Temperature distribution of top surface Fig.4 Temperature distribution of the fractal heat exchanger The fluid flow and heat transfer process is studied by CFD software.
The fluid flow and heat transfer process is simulated by CFD software.

On the effect of Slotted Blades on Savonius Wind Generator Performances by CFD analysis A.
Computational Fluid Dynamic Analyses To investigate the overall aerodynamic performances of Savonius wind turbines with slotted blades and buckets overlapping (see Fig. 1), Computational Fluid Dynamics – CFD analyses are performed by using the commercial code Comsol Multiphysics®.
The results obtained through the present CFD model are compared with those obtained by Akwa et al., who employed numerical solutions [13], and by Blackwell et al., who performed experimental studies [12].
Thus, parametric numerical simulations have been performed on the slotted blades configuration for both static and dynamical conditions.
Validating simulations The validating analyses have been performed on a Savonius wind turbine with blades overlap only whose geometric characteristics and flow conditions are those used by Akwa et al. and Blackwell et al. [12, 13].

The numerical simulation of the flow field in the micro-pressure inner loop reactor LIU Jiang-chuan1, a, YIN Zhi-gang1,b and JI Wei1,c 1School of Water Resources and Environmental Engineering, Changchun Institute of Technology, Changchun 130012, China aLiujiangchuan@yeah.net, bYinzhigang1972@163.com, cJiwei2012gc@163.com Keywords: the micro-pressure inner loop reactor, numerical simulation, mixture model Abstract.
The continuity equation: The Momentum equation is got though the summation of all respective phase momentum equation, it can be represented as the following: The relative speed is defined as the second phase: The relationship between the relative speeds and the drift velocity can be represented by the following formula: The equation of volume fraction: Numerical Simulation The micro-pressure inner loop reactor which is used in this model is shown as the figure 3, The length of the container is 80 cm, The height of the container is 60 cm, The width which is located at the top of the right side of the tube is 8 cm, and the height is 30 cm, it is connected with the atmosphere.
The Simulation Results and Discussion By calculating, we can get the velocity distribution field; trace the whole calculation domain and the volume fraction of air, the calculation results are shown in the figure 4 to figure 7. (1)The figure 4 is a velocity vector diagram of the hybrid model, the boundary of the contact with the atmospheric outlets meets the reality, because the gas which is squeezed out constantly can cause the velocity of gas-liquid mixing, and the velocity vector is Sometimes positive, sometimes the reverse.
Numerical Simulation and Experimental Study on Micro-Pressure Internal Circulation Reactor, J.
Edi.), 14(4). 11-14(2013) (In Chinese) [7] XU W, YU G, XUE C H, etal, Biochemical Changes Associated with Fast Fermentation of Squid Processing By-Products for Low Salt Fish Sauce, Food Chemistry, 107(4).1597-1604(2008) (In Chinese) [8] XIAO Hao-fei, ZHOU Mei-hua, CFD Simulation of Gas-Liquid Flow in Aeration Tank, Journal of Anhui Agri.

Guobiao Cai et al. [7] investigated an optimization approach using CFD for performance prediction and optimization of the nozzle shape.
It was shown that the proposed extension was capable to be implemented in commercial computational fluid dynamics (CFD) programs.
He successfully used the CFD software package Fluent with Reynolds-Averaged Navier-Stokes (RANS) equations for his investigation.
[9] Kercher, D.M., “A Film-Cooling CFD Bibliography: 1971-1996”, Int.
S., (2005) "The Modelling of Film Cooling - Part 11: Model for use in 3D CFD."

CFD technology is used for simulation to obtain the airflow organization of the garage [1].
There are 8 induced fans with jet Angle of 15 °in this simulation [2].
In order to simulate the spatial distribution of the co released in the space of garage, the volume source is used in the CFD model to send out co, 12 pollution sources are uniform distributed on the driveway, there size is 0.5 m x 0.5 m x 0.2 m.
Numerical simulation research of no duct induction ventilation system in underground garage[D].
Numerical simulation of contaminant concentration in the underground garage.

Recently, a few authors have focused on the impact and deformation behaviors of spray particle by simulation such as in [1, 2].
�umerical Method As can be seen in Fig.1, the high pressure and high temperature Helium gas was taken into a converging/diverging gun, also called de Laval nozzle, using Ansys/CFX® Computer Fluid Dynamics (CFD) simulation program.
Then, the total simulation time for explicit dynamic analysis was set as 66ns.
It should be also recognized that all the simulation were conducted without considering the oxide films and the possible adhesion between particle/substrate as well as particle/particle, which will commonly cause the bounce of particle after simulation.
With all the previous settings and from the CFD model outputs, the explicit dynamic analysis finished normally in 66ns by using Ansys/Autodyn® simulation software.

At present, the major techniques to study the critical velocity are experiment and Computational Fluid Dynamics(CFD).
They used propane gas as the fuel and carried out a series of experimental tests and CFD simulations to five small-scale model tunnels having different cross-sectional geometry.
Numerical Simulation of Critical Velocity Using FDS Geometry and Initial Conditions of the Numerical Simulation.
The simulation time was set to be 240s.
Fig.2 Simulation results when fire heat release rate is 5MW Values of Dimensionless Critical Velocity Predicted by FDS Simulations and Calculated by Wu’s Model.

Divided into consideration specific heat ratio change and not consider two kinds of scheme design of 1.4Ma nozzle profile and build the model using the arc line method, numerical simulation is carried out through the CFD software Fluent, analysis of two kinds of design scheme comparison.
The Numerical Simulation of the Nozzle In order to compare two design is good or bad, through the CFD software FLUENT on the numerical simulation of nozzle flow field, and the simulation results were compared and analyzed.
In order to improve the accuracy of 3D model simulation.
Supersonic / hypersonic nozzle design and numerical simulation of specific heat surface[D].
Designing and numerical simulation on two dimensions supersonic nozzle[J].