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Introduction Computational Fluid Dynamics (CFD) has become a commodity used regularly for the design of aircraft with continuous growing of computing power.
Solution-based adaptively refined grid generation approach should be a fundamental technique for a flexible and reliable CFD simulation, as pointed out by reference [1] by the experiences of numerical simulations with Boeing’s TRANAIR software.
Three solution adaptions are applied for all the simulations in this case.
As can be seen, the cells in the grid of simulation 10s are only 68.65% of that in simulation 12, while simulation 10s give the best results which contains a sharp shock wave without oscillations.
Flows around RAE2822 airfoil and Suddhoo four-element airfoil are carefully investigated to validate the feasibility and efficiency of the method for adaptively refined Cartesian grid in CFD.

The Research to Hydrocyclone Desander of Sand Removing Based on Crude Oil Ding Fenga, Xiaofei Chang, Xianyong Zhang, Shouyong Li, Chao Ruan, Yu Xie School of Mechanical Engineering, Yangtze University, Jingzhou, Hubei, 434023, China afengd@yangtzeu.edu.cn, fengd0861@yahoo.com Keywords: Hydrocyclone CFD modeling Offshore platform Crude oil Abstract.
This paper discusses the requirements for the design of the hydrocyclone desander equipment with compact structure, applicable to offshore drilling platforms，and carrying out CFD simulation, the results showing that the particle size of 75 of sand, grit removal efficiency above 90%. 1.
In pace with rapid development of computer hardware and software technology recently, the use of computational fluid dynamics (CFD) flow properties of engineering technical analysis has become a development[1-9]. 2.
[3] Ma Wenbing,2006,The Flow Field Simulation and Control Research of Hydrocyclone [4] XU JI, 2006 The Flow Field Simulation and Control Research of Hydrocyclone[D]; Liaoning University of Science and Technology
[7] ZHU Tong; Tsutomu Nozaki; XU Cheng-hai; ZHANG Shi-wei (School of Mechanical Engineering and Automation; Northeastern University; Shenyang 110004; Liaoning Province; China); Numerical analysis of particle motion in flow field of revolving-type solid-liquid separator[J], Chemical Engineering(China), 2007，35(8): 37-41 [8] Yong Dong, 2009, Research on Simulation of Multiphase Flow & Structural Optimization Design of Liquid-Solid Separator, Tianjin University, May [9] Wei Wang, 2009, Simulation of Solid-liquid Separation in Hydrocyclone by Applying CFD, Tianjin University, May [10] Kelsall D F.A study of the motion of solid particles in a hydraulic cyclone[J].

Contrast four different kinds of valve structure by CFD and get the valve structure of minimum flow resistance.
This paper aims to minimize axial flow check valve’s flow resistance, using CFD simulation to achieve optimization of nozzle, valve disc structure, to obtain a kind of structure which has smaller flow resistance. 2.
Numerical simulation method 4.1Model simulation Three dimensional model as shown in figure 3.
As is shown in table 1, using CFD numerical simulation method on the original disc flow resistance characteristics are analyzed, and compared with the experimental data, the relative error is less than 5%. 4.2 Structure optimization （1）Optimization of Entrance contraction part ：Change circular arc to elliptic arc type.
Hydrodynamic Characterization of a Nozzle Check Valve by Numerical Simulation[J].

Application of CFD method in prediction of relationship between discharge and differential pressure of inlet passage of bulb tubular pump[J].
CFD numerical simulation on modification of flow pattern with flow deflector at fore-bay of pumping station [J].Water Resources and Hydropower Engineering, 2006, 37(9):41-43.
Analysis and optimization based on CFD numerical simulation on inlet flow pattern of lateral diversion and intake pumping station [J].Water Resources and Hydropower Engineering, 2012, 43(2):72-75.
Numerical Model for Simulation of Pump-Intake Flow and Vortices[J].
Consideration to several problems in the application of CFD to pump [J].Drainage And Irrigation Machinery, 2005, 23(5): 1-10.

Numerical Method on Drug Release from Nanoparticles using CFD Siti Aslina Hussain a, Mohd Imran Rosly b, Norhafizah Abdullah c Department of Chemical and Environmental Engineering Faculty of Engineering, Universiti Putra Malaysia Serdang, 43400 UPM, Serdang Selangor, Malaysia aaslina@eng.upm.edu.my, bImran.Rosly@fngp.com cfizah@eng.upm.edu.my Keywords: Drug, CFD, nanoparticles, diffusion, release, profile.
The primary objective of this study is to investigate drug release profiles in water (H2O) by using Computational Fluid Dynamics (CFD) software which is CFX-Multiphysics (version 12) codes.
CFD studies can provide superior visualization that would not be available through conventional laboratory experiments.
(a) (b) Figure 9: (a) 3D Model A and meshing generated from the simulation and (b) Contour plot of the nanoparticles drug at the centre of PLGA at 5000 s, 10000 s, 15000 s and 20000 s.
(a) (b) Figure 10: (a) 3D Model B and meshing generated from the simulation and (b) Contour plot of the nanoparticles drug at the centre of PLGA at 5000 s, 10000 s, 15000 s and 20000 s.

And the result was compared with that of existing experiment to find a reasonable method for the simulation of the flow field inside the cyclone.
In this article, the flow field inside tangential inlet cyclone separator is simulated by CFD method, and the result is compared with that of experiment to find a reasonable method for the simulation of flow field inside the cyclone.
This CFD simulation first bases on standard k-ε model and tries to find an optimal combination, so there are 5 factors need to be considered, including 1 two-level factor and 4 three-level factors.
Numerical simulation study of gas-solid two-phase movement within cyclone Separator.
Wang.Computational fluid dynamics analysis-Principle and application of CFD software.

This type of model represents the oxidation of the metal with a scalar, and is widely available in commercial casting CFD packages.
Reilly [6] developed a model built around FLOW-3D™, a commercial CFD package, which allows user defined subroutines to be incorporated.
Where a distinct entraining event was identified, a particle was placed, to be tracked by the CFD solver using a Lagrangian method.
The motion of the particles is then tracked using a Lagrangian method by FLOW-3D™, for the remainder of the simulation.
Hopperstad, Through-process numerical simulations of the Structural Behaviour of Al-Si Die-Castings, Comp.

Research on Effects of Diameter and Arrangement of Nozzles on Combustion and Emissions in Cylinder Jue Li1,a, Zirui Lou2, Wei Hong1,b* 1State Key Laboratory of Automobile Dynamic Simulation, JiLin University, Changchun JiLin, China; 2FAW Car Limited Company, Changchun, JiLin, China; a.lijue8503@gmail.com; b.Hongw@jlu.edu.cn Keywords: Common rail diesel engine, fuel atomization, combustion, nozzle’s number and diameter, nozzle’s arrangement, numerical simulation Abstract.Based on the YD4A75-C3 electronically controlled common rail diesel engine, using CFD simulation software, the combustion and emission’s behavior in cylinder was simulated on the numbers, diameter and arrangement of nozzles.
In recent years, with the improvement of computer, CFD simulation software is widely applied on the numerical simulation of combustion process in cylinder and the fuel movement in diesel engine injector.
In the paper, based on the YD4A75-C3 electronically controlled common rail diesel engine, using CFD simulation software Fire, the combustion and emission’ behavior in cylinder was simulated on the numbers, diameter and arrangement of nozzles.
The method could show accuracy of simulation calculation.
Numerical Simulation of Flows in Engine Injection System [J].

During the simulation, the density of particles takes 1000kg/m3.
Simulation of Particles In this study, The Lagrangian particle transport model was used to track particle movement.
So in the simulation, the number of particles that hit the incisions was considered as one of the evaluation index.
Incisions Layout The simulation results are shown in tableⅤ.
[5] Jelena Srebric, Vladimir Vukovic, Guoqing He, and Xudong Yang, “CFD boundary conditions for contaminants dispersion, heat transfer and airflow simulations around human occupants in indoor environments,” Building and Environment, vol. 43, no. 3, pp. 294~303, March 2008.

Table 1 shows the main parameters of CFD simulation test including the physical properties of crude oil.
The simulation test operated until reaching the steady state condition.
The results from developed CFD simulation program were already validated with the commercial program ANSYS FLUENT [9].
The parameters for CFD simulation test.
The simulation results showed that those all 8 profiles had quite similar patterns.