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Numerical Simulation of Catalytic Combustion Based on Different Catalyst Structures Peiwen Wang1,2,a ,Yang Du1,b, Weidong Shen2,c , Jianjun Liang1,d, Jiafeng Xu1,2,e 1Department of Military Oil Supply engineering, Logistical Engineering University, Chongqing, China 2Key Laboratory of Special Power Supply of PLA, Chongqing Communication Institute, China a13594199055@139.com,bduyang58@163.com, c13908341643@139.com,dcomet613@163.com,e13062308087@139.com Keywords: catalytic combustion, catalyst structure, CFD, simulation Abstract.
The catalytic combustion of methane over a single pellet catalyst of different structures was modeled by two-dimensional numerical simulations.
The gaverning equations (continuity, momentums, energy,species mass conservation equation) are solved using the commercial CFD code FLUENT.
Parts of simulation results was shown in Fig.4 .
Results of the simulation investigations of combustion in a single pellet catalyst are presented.

In addition, high requirements of equipment to obtain the flow characteristics of ring seals which is costly, it is very difficult to obtain the leakage through experimental method, and based on CFD simulation is often ignored seal ring clearance in most cases.
Thus, the integral model of wear-ring was considered to simulate by CFD and it has great significance to analyze its volume loss [2, 3].
American Baskharone use finite element analysis method for multi-stage pump to simulate internal clearance leakage flow and analyze its impact by way of CFD, and the results compare to the existing model with leakage[ 4].
In summary, the numerical results indicates it more accurate and feasible for submersible well pump simulation.
Zhao: Research on Wear-rings of Centrifugal Pump Based on CFD Cod (MS., Huazhong University of Science, China 2006), p. 27-28, 47-49

The model used for the CFD analyses The heat accumulator considered in this paper consists of a metal box with thermal insulation.
Fig. 1 The CAD model of the heat accumulator used in the CFD analyses Fig. 2 The mesh used for the CFD analyses The CFD analyses used three mathematical models to obtain the melting of the wax, the heat transfer inside the wax, through the copper wall of the water pipe and inside the flowing water and the turbulence inside the fluids.
The obtained results for the model of the heat accumulator The results of the CFD analyses are showed in a plane which passes through the middle of the water pipe.
At the end of the simulation the maximum temperature of the wax had a value of 90ºC.
At the end of the CFD analyses the temperature value of the water exiting the heat accumulator is 55ºC.

This data base is generally available from wind tunnel testing or from CFD aerodynamic simulations and contains aerodynamic coefficients for different flight conditions and configurations (such as Mach number, angle-of-attack, vehicle configuration angle) encountered over different space vehicles mission.
Another type of data is numerical data resulting from CFD simulations, with a lower level of confidence, which depends also on the used numerical method (Euler / RANS, flow regime, etc.)
The data sets considered in this work contains output values obtained from two different sources (experimental measurements and CFD simulations).
However one of them (experimental measurements) is supposed to be more accurate than another (CFD simulations).
However, if region contains lots of HF experimental points then in this region CFD points should be treated as LF, whereas in region without experimental points CFD points become HF data (see Fig. 3).

One Based Magnetic Oxygen Carrier Solid Fuel Chemical Looping Combustion System Simulation WenYan Li1, a, MingZhong Gao2,b 1North China Electric Power University, Beijing, 102206, China aliweny@vip.sina.com, bgaomingzhong911@163.com Keywords: Chemical-looping combustion; Fe2O3; Fe3O4; CFD.
In this paper, Computational Fluid Dynamics (CFD) was used to simulate the magnetic device for the separation of Fe-base oxygen carrier in chemical-looping combustion system.
The simulation was based on the Euler multiphase flow model and the k-ε turbulence model, which uses UDF programming to increase volume source phase.
In recent year, the software Fluent that based on commercial computational fluid dynamics simulation has good effect.
Simulation the trajectory of the particles of the magnetic substance in the magnetic force with UDF add source phase.

Development of SIMPLE-like Algorithms for Incompressible Navier-stokes Equations in Liquid Processing of Materials Haijun GONG1, a, Yang LIU2, b, Xueyi FAN1, c and Daming XU1, d 1 School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China 2 School of Physics and Electronic Engineering, Harbin Normal University, Harbin, 150301, Heilongjiang, China a331ghj@163.com, bkaxiu_0453@126.com, cfan_xueyi@yahoo.com.cn, ddamingxu@hit.eu.cn Keywords: incompressible flow, Navier–Stokes equation, SIMPLE-like algorithm, numerical simulation, CFD Abstract.
For a clear and comprehensive opinion on segregated SIMPLE algorithm in the area of computational fluid dynamics (CFD) during liquid processing of materials, the most significant developments on the SIMPLE algorithm and its variants are briefly reviewed.
In general, the grids commonly used in CFD can be divided into structured grid and unstructured grid.
Correspondingly, structured grids are easy to generate and deal with correspondingly, and can provide more effective and accurate simulation than unstructured grids usually, so structured grids, such as staggered grids, collocated grids and nonorthogonal grids were applied widely.
，et al: Numerical Simulation of Heat, Mass and Momentum Transport Behaviors in Directionally Solidifying Alloy Castings Under Electromagnetic Fields Using an Extended Direct-Simple Scheme, Int J Num.

The Numerical Simulation of the Relation between Displacement Ventilation Efficiency and Different Outlet Position Zhenjie Hu1, a,Xiaofan Song2,b 1Architectural Design and Research Institute of Tianjin University ,Tianjin30072,China 2Tianjin Chengjian University ,Tianjin300384,China ahuzhenjie@tju.edu.cn, bsongxiaofan0413@163.com Keywords: Outlet position,CFD,Ventilation efficiency,Supply air velocity and temperature Abstract.
Using CFD software to simulate the indoor different ventilation system of different outlet position.
Fig. 1 Schematic diagram of physical model This paper use CFD to analysis the distribution of velocity field and temperature field in the displacement ventilation system with high sidewall outlet or traditional displacement ventilation .
The results and analysis of numerical simulation The used assumptions during simulation
The analysis and comparison of simulation results.

Large Eddy Simulation of Unsteady Flow in a Mixed flow Pump Guide Vane Yibin Li1, Rennian Li1,a and Xiuyong Wang1 1School of Energy and Power Engineering, Lanzhou University of Technology No.287 Langongping Road, Lanzhou, 730050, China, alirn@lut.cn Keywords: Mixed-flow pump, guide vane, pressure fluctuation, vortex, LES, CFD Abstract.
Due to the high price, time costing and lag of the experimental method, and with the development of fluid dynamics, CFD (Computational Fluid Dynamics) numerical calculation technology has been widely used in the field of three dimensional turbulence numerical simulation with advantage of short period and leading character.
Miorini, et.al.[3] discover the blade tip leakage vortex structure and unsteady flow mechanism of mixed-flow pump by PIV (Particle Image Velocimetry) and CFD (Computational Fluid Dynamics).
Doing unsteady flow numerical simulation of inner flow field in the mixed flow pump can forecast the characteristics of pressure fluctuation through analyzing the complexity of mixed flow pump inner flow field by using numerical simulation, which has great significance for the project.
Comparing to the prediction of Reynolds-averaged Navier-Stokes (RANS)equations, the CFD unsteady performance prediction cannot forecast the H-Q positive slope precisely basing on the equations.

ANSYS Fluent is used to conduct steady-state simulations.
Results and Discussion CFD Validation.
The present CFD model is validated by comparing its results with experimental data.
Numerical simulations are conducted based on obtained conditions to validate optimization.
The difference between the numerical simulation results and the RSM response was less than 1%.

The values of experimental study and current CFD study are found to be in good agreement.
Simulation is carried out from 0º to 20º.
While the graphs clearly follow the trend and the simulation data does match the experimental results, there is a slight variation which is due to the computational errors from the CFD codes.
Figure 2: Comparison of expt [16] and CFD simulation current study CW Fig. 3 shows the velocity contours for the AoA range 0-20º.
Both the CW experimental and simulation show stall at 15º.