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Numercial Simulation of a Special Valve in Pneumatic Conveying Pipelines Xiaobin Huang1, a, Siyuan Zhang1,b , Yufeng Luo1 and Wenbiao Zhang1 1School of Control and Computer Engineering, North China Electric Power University, China abin_huangcn@126.com, bmercuryzsy@126.com Keywords: gas-solid flow, CFD simulation, primary air duct, regulating valve Abstract.
This simulation uses SOLIDWORKS to build the valve model ICEM-CFD to generate the mesh, and FLUENT to numerically simulate the fluid field in pipeline under different opening degrees of the valve.
Fig. 1 Valve Plug Numerical Simulation In this paper, commercial CFD software----FLUENT is used to conduct the numerical simulation.
The stable Lagrangian discrete phase model (DPM) is used in the simulation.
Chen: Fuel. 81 (2002) 829-835 [4] Xinming Yuan, Genhai Mao and Shiqiao Zhang: Journal of Hydroelectric Engineering. 4 (1999) 60-66 [5] ICEM CFD 14.5 User’s Guide.Ansys Inc

Student, Mahran Dawwa1* 1Constanta Maritime University, Constanta, Romania 1mahrandawwa@gmail.com Keywords: CFD, eddy dissipation model, combustion, diesel engines.
The aim of this study is to simulate the combustion process in the combustion chamber of diesel engines by using eddy dissipation model (EDM) and computational fluid dynamics method (CFD).
The simulation steps and the simulation results will be discussed and illustrated.
Sunnapwar, CFD Modeling and Experimental Validation of Combustion in Direct Ignition Engine Fueled with Diesel, International Journal of Applied Engineering Research, Vol. 1, No. 3, 2010
Anang, Multidimensional CFD Simulation of a Diesel Engine Combustion: A comparison of Combustion Models, Proceeding of the FISITA 2012 world automotive congress, Lecture Notes in Electrical Engineering, 190 (2012) 879-893.

Computational fluid dynamics (CFD) design and simulation of ascending micro channel for cell separation using inertial focusing technique is used for separation.
Xuan et al. performed CFD simulation to study the phenomenon of a two-layer laminar flow in a curved micro channel to realize the transfer of mass and offer feasible methods of performance enhancement for the devices of micro fluidic.
CFD simulation was succesfully demonstrated for separation of 15 µm particles from the mixture with 100% efficiency.
The process of simulation begins with creating 2D lay out model, generating a mesh, and applied boundary conditions using CFD GEOM module.
Numerical studies were conducted with a commercial CFD package, CFD ACE + and simplified model was developed.

CFD simulations have been carried out by combining DPM to predict the erosion rate and particle impaction regions in carbon steel 90° elbow with a diameter of 50.8 mm.
The current research on CFD simulation of erosive wear in literature was performed with discrete element modeling or discrete phase modeling to simulate wear due to erodent impaction [12].
In CFD-DPM, the boundary condition isdefined as an inlet, outlet, and elbow pipe wall.
As the difference in the predicted erosion rate at the outer wall from mesh 2 was less than 2%, in comparison with mesh 3, the CFD simulations for this study were executed considering mesh2.
Vorticity contours of 90° elbow Conclusions Based on the CFD-DPM, a simulation study was performed to scrutinize the influence of fluid viscosity on erosion phenomena of the elbows configurations for liquid-sand flow operating conditions.

Recently some attempts to use CFD to predict inertial separator performance can be found.
Pressure drop of wave-plate separators with different vane spacings under various inlet velocities are gained using CFD simulation method , and the result are shown in Fig.7.We can see that pressure drop increase greatly with the increasing of inlet velocity,and under the same inlet velocity, the separator with large vane spacing has lower pressure drop.
The resistance characteristic is drawed in Fig.9 and compared. with CFD result.
Fig.8 Schematic of experimental apparatus and experimental device Fig.9 Pressure drop of separators as function of inlet velocity (layer spacing is 10mm and 12 mm) Conclusions CFD simulation and experiment method are combined together in this study to predict the pressure drops of a kind of wave-plate inertial gas-liquid separator.
Pressure drops acquired by numerical simulation and model experiment agree well, So the numerical simulation method is reliable in the resistance characteristic research of wave-plate inertial gas-liquid separators.

Numerical Simulation of 2D Model of Diffuser for Tidal Turbines Nasir Mehmooda, Zhang Liangb and Jawad Khanc College of Ship Building Engineering, Harbin Engineering University, Harbin, Heilongjiang, China athatsnasir@live.com, bzhangliang@hrbeu.edu.cn, cjawadkhan2008@hotmail.com Keywords: Ducted turbine; Shrouded turbine; Diffuser augmented tidal turbine; Numerical simulation of diffuser; CFD simulation of diffuser Abstract.
The research is essential for utilizing CFD tools for diffuser design for tidal turbine.
Geometry of Diffuser and Boundary Conditions Norimasa’s Bulge type diffuser without brim is selected for CFD simulation.
CFD simulation of 2D model of diffuser has been carried out.
CFD results are compared to experimental results and found in reasonable agreement.

The CFD numerical simulations consist of two and three-dimensional transient and steady analyses.
CFD Simulations were made find the relationship between the flow rate and the blade geometry.
These results are very similar to the ones obtained in the CFD analysis.
CFD Simulations were made to find the relationship between the flow rate and the blade geometry.
His detailed review, constructive criticism and excellent advice during the CFD Simulations were of great value for this research References [1] Staubli, T. and Hauser, H.P.

A Subdomain Method for the Aeroacoustic Simulation of a Generic Side View Mirror Lina Huanga, Mingxin Xueb, Hao Dongc, Bo Yangd State Key Laboratory of Automotive Simulation and Control, Jilin University, 5988 Renmin Street Changchun, China alnhuang11@mails.jlu.edu.cn, bsugarxiaoxin@126.com, cdonghao12@mails.jlu.edu.cn, dyang_bo@jlu.edu.cn (Corresponding Author) Keywords: computational aero-acoustics, side view mirror, subdomain, CFD simulations.
With the principal advantage of saving CFD cell numbers, the subdomain LES method would be a perspective way to simulate the aerodynamic noise of complex geometries such as the real automobiles.
In CAA method, both the acoustic sources and the receivers are in the computational domain, the acoustic information can be obtained from the CFD.
This method is performing an aerodynamic steady CFD simulation in the whole domain.
The simulations were carried out using a commercial code, SC/Tetra.

Prediction of Combustion Behavior in a Boiler Fired by Mixture of Vietnamese Anthracite and Coal Gas Using CFD Gia My Tran1,a*, Duc Dung Le2,b Hanoi University of Science and Technology, Hanoi, Vietnam amy.trangia@hust.edu.edu.vn, bdung.leduc@hust.edu.vn Keywords: anthracite-coal gas, composition, unburned carbon, CFD simulation Abstract.
The CFD simulation is used for the zone 1.
The objective of this study is to predict the combustion behavior of single coal and mixing domestic anthracite with coal gas when fired in a downshot furnace operated in Vietnam by using CFD numerical simulation.
All simulations are run K-ε reliable model for turbulent gas phase.
Yu, “A three-dimentional CFD model for coal blends combustion: Model formation and validation”, Fifth International Conference on CFD in the Process Industries, 2006 [12] R.I.

In the paper CFD is applied to a rotor at stationary hydrodynamic conditions Simulations from the numerical prediction are compared with experimental measurements of the model of MCT which is experimented on in a cavitation tunnel and a towing tank.
Comparisons between experiments and numerical simulations at 5o set angle.
Comparisons between experiments and numerical simulations at 10o set angle.
Comparisons between experiments and numerical simulations at 13o set angle.
For TSR > 7 both CFD simulations tend to over predict the power coefficients for set angles 5°-13°.