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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.

Simulation result 2.1 CFX pressure The pressure status of hub and cutter pressed and its pressure distribution can be seen directly (CFX pressure is shown in Fig.3).
The plugin is designed to exchange information between the FEA and CFD calculations to ensure the continuity of stress and shape transformation across the FEA/CFD boundaries.
A thermal coupling simulation is realized through an iterative procedure between the FEA and CFD calculations.
Convergence of the FEA and CFD calculations in the iterative loop is satisfied as in normal individual FEA and CFD simulations, respectively[6,7].
(a) (b) Fig. 5 Total deformation result Conclusion We have proposed a 3D model for numerical simulation of aquatics hub cutter in ANSYS12.

Mcllvenna [3] analysed transfer chute performance using 2D CFD based on kinetic theory.
CFD Modelling Model Verification.
From this perspective, the experiment and simulation compare well.
DEM-Simulation of Conveyor Transfer Chutes.
Predictions of Dust Loss from Conveyors Using CFD Modelling.

Connect lath Fig. 1 Structure of New Resistance Wind Rotor CFD of Wind Rotor To make clear the air flow function to wind rotor, the simulation of the flow field with the CFD software Fluent was done.
Fig.2 shows the results of the CFD.
Flow of the simulation is air.
The result of the experiment shows no difference to the CFD simulation, so the simulation result is believable.
The pressure field structure of the out flow and the static torque output characteristic of it are brought to light by the CFD simulation and the static torque output experiment.

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.

The numerical simulation in the classification has been used in ANSYS CFX 10.0.
Conditions for Numerical simulation [1-3] We build a model using Pro/E, and import the model into the ICEM CFD for tetrahedral mesh, and encrypt for some parts as needed.
Unstructured grid technologies and ICEM-CFD meshing tools are used to mesh of the calculation model.
References [1] ICEM CFD Engineering Meshing Tutorial Manual[Z].
[2] Fu-jun Wang．Computational fluid dynamics analysis：Principles and Applications of CFD software[M]．Beijing:Tsinghua University Press，2004．In Chinese

To get information on velocity and pressure distribution for different outlet angle, Computational Fluid Dynamic (CFD) simulation can be used.
The design optimization was performed with the computational fluid dynamics (CFD) code FLUENT [5].
The objective of the simulation is to minimizing disturbance to the aircraft which carries the system.
CFD simulation of the different diffuser outlet angle provides useful insight in understanding of the velocity and pressure distribution.
ANSYS ICEM CFD grid division technology and its examples.

Keywords: roughness of materials, CFD, cast iron, plastic Abstract.
A hydraulic simulation in pipes allows us to analyze the hydraulic behavior under various conditions.
The fluid dynamic simulations were performed at the Center for Modeling and Simulation Environment and Water Resources (NUMMARH) of the Natural Resources Institute of the Federal University of Itajubá (MG) using CFD software.
Mesh generation was performed within the CFD software.
CFD Expertise improves product design and operational behavior, World Pumps, Volume 2006, Issue 483, Pages 22,24,25, 2006 [3] DORSCH G.; KEERAN K., Chopping Away at Solids, Advan-tage, Excellence in Engineering Simulation, Volume I, Issue 2, Pages 16-17. 2007.

Therefore Reverse Engineering (RE) and numerical simulations of Computational Fluid Dynamics (CFD) are adopted to study the centrifugal pumps with splitter blades.
To solve these problems, Using RE, CFD numerical simulation and experimental method of combining to study with flow field distribution of centrifugal pump with splitting vanes.
The three-dimensional geometric model of centrifugal pump CFD simulation is the flow channel of pump.
Conclusion above indicates CFD numerical model can replace experiment and has large engineering practical value for the rapid development of such products and reduce cost to some extent.
However, CFD numerical model has some errors.

Structure Optimization Design and Airflow Numerical Simulation for Negative Pressure Isolated Cabin Yanjun Zhang 1a, Feng Tian *1b, Jian Yang1c, Qiuming Sun1d, Mingxi Hu1e , XiaoJun Sun1f, Peng Li1g 1Institute of Medical Equipment ,Academy of Military Medical Science, Tianjin China aAmms7@126.com bTianfeng62037@yahoo.com.cn cJianyang03@Gmail.com dSQM_sunnybird@163.com eHumax@126.com f13512062502@126.com g 86584727@126.com Keywords: Negative Pressure isolated cabin, CFD, Airflow, Numerical Simulation Abstract: Structure optimization design of negative-pressure isolated cabin and numerical simulation for airflow are preformed by using CFD method，and trace of expiration contamination by patient are studied.
This paper carried out structure optimization design of negative-pressure isolated cabin to gain inlet size of the cabin, and preformed numerical simulation of airflow and trace of expiration contamination by patient by CFD method.
Fig1 3D model of the cabin Fig2 CFD model Fig3 Main dimensions indicate Calculate model equations Air indoor flow is in turbulent process, selecting standard k-ε turbulence as model calculation.
Conclusion (1) This paper performed the structure optimization design and determined the inlet size of the negative pressure cabin based on CFD method.
[3] Xin Feng, Zhonglin Xu:Analyses of Numerical Simulation and the Effect on Air Distribution of Negative Pressure Isolation Rooms, Buiding Science,22(2006)35-45