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The conclusions will provide the basis and reference for the performance prediction of axial-flow pumps based on CFD.
The numerical simulation and performance prediction of the internal flow of axial-flow pump bases on CFD could reduce or even replace the model test which has a high cost and a long cycle.In recent years, the numerical simulation of the internal flow of axial-flow pumps based on RANS equation has been widely used in flow analysis of axial-flow pump models, optimization of inlet and outlet runners of pump station and so on.
Numerical simulation method Governing Equations.
The second order implicit scheme is adopted for the turbulent simulation.
The calculation results of steady simulation are showed in Table 1.

In this paper the heat transfer simulation of the gas-solid multiphase flow in ethylbenzene dehydrogenation catalyst kiln, heat conduction, convection and radiation involved, has been expressed by using the computational fluid dynamics (CFD) method.
With continuously increasing computer power, computational fluid dynamics software has made it possible that CFD methods can be applied to the heat transfer for the ethyl benzene dehydrogenation catalyst in the kiln.
Numerical Simulation of Heat Transfer in the Catalyst Drying Kiln Model.
Fig. 1 Whole computational domain Fig. 2 Mesh model The computational domains are discretized with the commercial CFD software.
Conclusion The paper presents a numerical method to simulate heat transfer for the ethyl benzene dehydrogenation catalyst in the kiln, and the simulation results indicate that the numerical method by applying commercial CFD software can effectively simulate heat transfer in the catalyst kiln.

Ltd., Beijing 100083, China zxhe@ujs.edu.cn Keywords: Reverse Engineering, Exhaust passage, Cold ,Thermal , CFD, Discharge coefficient.
CFD Model and Numerical Grid The RE ( Reverse Engineering ) technology is used to reverse modeling L91 engine exhaust duct.
Simulations were performed with the air being both cold and thermal.
Comparison of simulation results with thermal and cold air.
Conclusions In this paper, CAD/CFD method was applied to the flow field analysis of engine exhaust port.

Numerical simulation on rivulets around stay cable subject to wind Jihong Bi1, 2, a, Jian Wang1,b, Peng Lu 1,c and Chun Bao 1 1School of Civil Engineering, Tianjin University, Tianjin 300072, China 2Key Laboratory of Coast Civil Structure Safety (Tianjin University), Ministry of Education, Tianjin 300072, China ajihongbi@sohu.com, bavonlea@163.com, clupeng@tju.edu.cn Keywords: Rain-wind induced vibration, Stay cable, Rivulet, Two-phase flow, VOF method, Numerical simulation.
The effect of gravity and air flow on morphology of rivulets is analysed by numerical simulation using computational fluid dynamics (CFD) software-CFX.
Li et al. quantitative measured and analysed the geometry and dynamic characteristics of rivulets around cable when RWIV occurred using ultrasonic transmission thickness measurement system in wind tunnel test [4], and then obtained the time history response of cable aerodynamic force by hybrid approach combining experiment and CFD numerical simulation [5].
To simulate the formation of rivulets more accurately, this paper presents a numerical simulation approach by combining gas-liquid two-phase theory and VOF method for the first time.
This approach is then applied to simulate the formation process of rivulets around cable and analyse the effect of gravity and air flow on morphology of rivulets using CFD software-CFX.

Tel: +86 431 85095271 Keywords: Free Piston Engine, Loop-Scavenging, Scavenging Efficiency, CFD Abstract.
CFD Modeling Model Configuration.
All CFD models require initial and boundary conditions.
Blair, Design and Simulation of Two-stroke Engines.
[6] J.Fredriksson, I.Denbratt, “Simulation of a Two-Stroke Free Piston Engine”, SAE paper, 2004-01-1871

3D Numerical Simulation of the Fluidized Bed’s Cold Distributor Hui Li 1, a , Xinhui Ma 2, b 1Huang He S&T College, Zhengzhou, 450063, Henan, China 2Xi’an Spaceflight Huawei Chemical biologic Engineering Co., Ltd, xi’an, Shanxi,710001, China afeng_109_1@163.com, b179321833@qq.com Keywords: Fluidized Bed, cold distributor, CFD, structural optimization.
Because of excessive pressure loss when the gas went through distributor in fluidized bed (FB), based on the principle and method of computational fluid dynamics (CFD), using the software, FLUENT, the inner flow field in the fluidized bed with distributor was simulated.
So, based on the principle and method of computational fluid dynamics (CFD), using the software, FLUENT, the inner flow field in the fluidized bed with distributor was simulated and the good advice was given on the structural optimization of the cold distributor. 3D Geometric Model In order to simulate the inner flow field more accurately, the simulation adopted the 3D model.
Fig.3 The mesh in the computational domain Simulation Results The pressure distribution with distributor and without distributor.
M., Discrete particle simulation of bubble and slug formation in a two-dimensional gas-fluidized bed: a hard-sphere approach, Chem.

This paper presents a simulation to investigate the effect of liquid’s viscosity on the flow field and hydrocyclone’s efficiency, using CFD technique and k-ε turbulce model.
The simulation calculates the two-phase flow under different liquid viscosity.
This paper, to explore how liquid’s viscosity affects the flow field and performance within a hydrocyclone, performs a simulation by changing the liquid viscosity and the particle volume fraction in the feed flow using CFD technique and RNG k-ε turbulence model[1-4].
Geometries and Simulation The hydrocyclone employed consists of a volute feed inlet, a cylinder, a cone, overflow tube and an underflow exit.
Fig.6 Pressure drop curve Conclusions This paper performs a simulation with CFX.

Abstract.Using ANSYS-FLOTRAN CFD program, the finite element simulation is conducted by means of a series of procedures, such as three-dimensional model building of airflow level posture sensor, network modifying, loads applying equation solving, the flow field in three-dimensional hermetic chamber of sensitive element of airflow level posture sensor in different acceleration and inclination is Calculated, The numerical results show that for the sensor of airflow level posture sensor, the effect of acceleration and inclination is similar.
The simulation result of three-dimensional modeling is more comprehensive and accurate, which provides more reliable basis for practical research of the airflow level posture sensor.
Solve of finite element method FLOTRAN CFD analysis function of ANSYS software is used for analysis 2d and 3d fluid flow of advanced tools.
(1)Selection of analyzing types: the choice of FLOTRAN CFD analysis capabilities of ANSYS software
[3] Guoqiang.Wang, “Numerical simulation and practice on ANSYS,” [M].

Computational Model Setup & Conditions Steady State Computational Fluid Dynamics (CFD) Simulation.
In the fluid domain, the Navier-Stokes equations were solved simultaneously in CFD simulation.
Based on the numerical procedure described previously, the results of CFD simulation are presented in Fig. 3~8.
Numerical results of the CFD analyses were then applied as thermal loads in the following mechanical simulation.
Results from CFD analysis were then used as thermal loads and input in the following thermo-mechanical simulations.

CFD analysis indicates that unstable vortices exist between runner blades.
To accurately find out the causes of vibration and noise in this power station, by checking the data, combining with the existing mature experiences about the transformation of the hydropower station at home and abroad, through plotting vibration points on the turbine performance curve and CFD simulation, it is learned that the vibration and noise are brought about by the channel vortices at higher head than the rated head, full load and overload.
CFD numerical simulation.
To further verify the vibration and noise were caused by the channel vortices, hydraulic parameters of the vibration operating points were reviewed and calculated under the CFD numerical simulation.
For example, vibration point a is marked by the head 62.59m and power 20.619MW, the CFD calculated results are in Figure 4-7.