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Security Analysis on Single-screw Extrusion Process of Solid Propellant by Numerical Simulation Zhongqi HE1, a, Ke ZHOU1,b , Shupan YIN 1,c 1 School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China ahzq555@163.com (corresponding author), b411607149@qq.com, cpyshu@126.com Keywords: Single-screw Extrusion Process; Solid Propellant; Security Analysis; CFD; POLYFLOW.
In this paper, the CFD software, POLYFLOW, and a numerical simulation method were adopted to investigate the rheological parameters in single-screw extrusion process of solid propellant.
Thompson[4] studied numerical simulation.
In this paper, the CFD software, POLYFLOW, and the numerical simulation method were adopted to investigate the rheological parameters of material of the screw extrusion process，which provides a scientific and effective reference to the technological process control and safety analysis.
Discrete Particle Simulation of Solid Compaction and conveying in A Single-Screw Extruder[J].

Numeberical Simulation of A New Enhanced Heat Transfer Burener Xiaofeng Lu a, Duo Liub , Yuanqing Lic School of Mechanical and Power Engineering, Nanjing University of Technology, Nanjing ,China axflu@njut.edu.cn, bld.deyouxiang@163.com, cliyuanqing6666@163.com Keywords: Enhanced Heat Transfer Burner; Heating Furnace; PDF Model; Numerical Simulation Abstract: In this paper, numerical simulation of a new type enhanced heat transfer burner was carried out by using the CFD commercial software FLUENT.
A research indicated using numerical simulation (CFD) to optimize the design, the overall error can be controlled to bellow 5 percents[8].
This paper studied a new burner through the numerical simulation method(CFD).
Computational model was set up in commercial CFD software FLUENT version 6.3.26 by using its built-in sub models and algorithms.
FLUENT Fluid Engineering Simulation Calculation Examples and Application.

Flow Pattern and Efficiency Changes of Squirrel Cage Fans due to Inlet Diffuser Diameter Changes - Using CFD Method and Experimental Validation Mojtaba Gholamiana, Gurram Krishna Mohan Rao and Panitapu Bhramara Department of Mechanical Engineering JNTUH, College of Engineering, Hyderabad, India agholamian.mojtaba@yahoo.com, bkmrgurram@jntuh.ac.in, c bhramara74@yahoo.com Key Words: Squirrel Cage Fan, Forward Blade, Diffuser Inlet, Flow pattern and Efficiency, Numerical Simulation Abstract.
Recently using the CFD calculation methods with sufficient related tools for finding the flow pattern and related parameters, applying modifications and representing proper solutions, has being increased.
A modern approach for finding out the flow pattern and properties, that recently has got a popular method, is use of CFD method with appropriate tools.
Simulation Fan Geometry and Mesh Generation.
[8] Bhzadmehr, A., Mercadier, Y., Galanis, N., Sensitivity Analysis of Entrance Design Parameters of a Backward-Inclined Centrifugal Fan Using DOE Method and CFD Calculations, J.

From simulation results obtained: Water-based nano boron carbide has good transmission fluid performance when nanoparticles mass fraction of 0.8%.
In CFD pretreatment, using automatic mesh method and insert inflation method to encryption grid at fluid contact with the pipe.
Fig.2 Fluid mesh inside the U-shaped pipe Numerical simulation of the U-shaped tube κ-ε turbulence model.
Tab.1 Density and viscosity of water based B4C nano fluid B4C mass fraction(%) Dynamic viscosity (mPa∙s) Density (g/cm3) Kinematic viscosity (mm2/s) 0.6 15.8 0.916 17.2 0.8 14.8 0.922 16.1 1.0 16.9 0.915 18.5 Simulation results and discussion By the FLUENT solver, can be obtained simulation results processing in the CFD post-processing.
Calculated pressure value at points labeled 1, 2, 3, 4 using the Function Calculator four in CFD after processing, shown in table 2.

Numerical Simulation and Analysis of Low Hysteresis Brush Seals Jiadong Chi1, a, Zhili Wang1,a and Like Li1,a 1School of Mechanical Engineering and Automation, Beihang University, Beijing, 100191, China ajarod_chi@163.com Keywords: brush seal; CFD; aerodynamic force; contact force; bristle deflection; size parameter Abstract.
Lelli and Chew [8.9] combined the CFD model with a mechanical model and obtained bristle deflections in the axial-radial plane.
In this paper,used the anisotropic porous medium model, computed by CFD soft FLUENT,the velocity field and the real aerodynamic loads on each node of the bristles are available.
CFD Model The bristles are regarded as porous medium.
Huang: Low Hysteresis brush seal numerical simulations, Journal of Beijing University of Aeronautics and Astronautics, 34(9), (2008), pp. 1080-1083

The diffuser potential field acting on the impeller has been studied using CFD by [19,20].
Zhao, Numerical simulations of stall inside a centrifugal compressor, Power and Energy IMechE. 221 (2007) Part A: J
Roger, Dougal, Dynamic centrifugal compressor model for system simulation, Journal of Power Sources. 158 (2006) 1333-1343
Flow simulation using control volumes of arbitrary polyhedral shape.
Peck, Validation of unstructured CFD modelling applied to the conjugate heat transfer in turbine blade cooling.

Characteristics Analysis of Tire Hydroplaning Flow and Tread Design Influence Study Yang Jian*, Wang Guolin and Zhou Haichao School of Automotive and Traffic Engineering, Jiangsu University, Zhenjiang 212013, China *email: yangjian@ujs.edu.cn Key words: tire hydroplaning; CFD; tire tread pattern; numerical simulation Abstract.
Aksenov et al [2], presented a three-dimensional simulation of the interaction between tire and free surface flow by virtual of Computational Fluid Dynamics (CFD) technology, but the deformation of tire surface was ignored and the computational domain remained fixed in time in his work.
Simulation results may vary by about 5%-10% with the computation domain size.
It is showed that CFD is an efficient tool in calculating and analyzing tire hydroplaning.
Numerical Simulation of Car Tire Aquaplaning[C].

In one stage, the pattern of WSS distribution changed strangely and the threshold image intensity value can result in reflective effects on CFD.
In order to perform modelling simulation, the selection of a grey-level threshold for vascular model generally used an automated method.
Computational fluid dynamics (CFD) analysis Blood flow through a cerebral aneurysm [2,9], assumed as incompressible.
Conclusion As a summary, the threshold image intensity values can profoundly affect to CFD analysis.
The development an extensive analysis of the numerical simulation may help to reduce the effect of the reconstructed geometry.

Coupled Wind-induced Vibration Analysis of the Membrane Structure Based on Steady-State CFD Xufeng Sun 1,a, Shirong Li 1,b 1Architectural Science and Engineering Institute, Yangzhou University, Yangzhou 225009, P.R.China axu_feng_sun@163.com, bsrli@yzu.edu.cn Keywords: membrane structure; coupled wind-induced vibration; CFD; aerodynamic damping; revision of the fluctuating wind velocity Abstract: Because of large flexibility and strong geometric nonlinearrity, the time domain method should be applied in the analysis of wind-induced vibration for the membrane structure, and the coupling effect between the structure and the fluid should also be considered.
In this problem, it is hard now to solve it directly using the technique of three-dimensional transient FSI based on CFD.
The general simulation of the fluctuating wind speed time function(e.g.
[5] Nozawa K, Tamura T: Large eddy simulation of the flow around a low-rise building immersed in a rough-wall turbulent boundary layer.
[7] Hargreaves D M, Wright N G: On the use of the k-ε model in commercial CFD software to model the neutral atmospheric boundary layer.

Modeling and simulation is a viable alternative approach.
In this paper, we present a CFD model using a three-wafer loading configuration which enables to predict the slurry flow between wafer and pad under different process variables.
Fig. 2 Geometry of developed model Simulation conditions Commercial software ANSYS™ 13 Workbench was used for this simulation study.
The simulation was conducted with a time step size of 10-3 s.
From the contours diagram, it can be seen that the contours exhibit similar trend to the velocity field obtained from the CFD model.