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Numerical Simulation of Ventilation Air Methane Counter-current Oxidation Reaction WANG Ying-Hua1, a, JIA Bao-Shan1, b, SHI Jun-Rui2, c, DENG Yang-Bo3, d, TIAN Yu1, e 1School of Safety Science and Engineering, Liaoning Technical University, Liaoning Fuxin 123000, China 2ShenYang Institutes of Engineering, Shenyang Circulating Fluidized-bed Combustion Technology Key Laboratories Liaoning Shenyang 110136, China 3Mechanical and Electronic and Materials Engineering Institute, Dalian Maritime University, Liaoning Dalian 116026, China awyh850903@163.com, bjbs1972@126.com, cshijunrui2002@163.com, ddengyb1970@163.com, ety880503@126.com Keywords: ventilation air methane; countercurrent oxidation; numerical simulation; equivalence ratio; half cycle Abstract: In this paper, based on the theoretical analysis and reasonable simplification, one-dimensional mathematical model is presented for the counter-current oxidation of ventilation air methane.
The process of counter-current oxidation reaction is simulated by applying the computational fluid dynamics (CFD) software (Fluent), and the effect of the dominating working parameters (such as flow velocity and equivalence ratio and half cycle) are discussed on the temperature and rate of reaction within the counter-current oxidation reaction.
are simplified as follows: Inlet: , Outlet: Outer wall temperature: Initial temperature: 2 Simulated results and analysis Based on the simulation research of the countercurrent oxidation device, the burning mechanism and characteristics are understood, and the effects of different working parameters are obtained on the combustion characteristics.
Porous medium reciprocating flow burning a numerical simulation.
Numerical Simulation on Reciprocating Super adiabatic Combustion Of Premixed Gases in Porous Media Journal Combustion science and technology, 2005 11(3),pp.230-235

CFD (Computational Fluid Dynamics) is growing to be a very useful tool to study the multiphase flow characteristics.
Experimental and numerical model The simulation was conducted on the base of FLUENT software.
After the convergence of gas flow simulation, droplets were added.
Discrete phase model (DPM) was employed to simulation the tracks of droplets and the particle collection efficiency.
Evaluations and modifications on reynolds Stress model in cyclone simulations.

Therefore, it is considerable significance to get the accurate simulation results of the temperature field.
A lot of research has been made about the temperature simulation of the laser welding [2-7].
The secondary development of OpenFOAM OpenFOAM (Open Field Operation and Manipulation) is a free, open source CFD software package.
The solver for simulation is the secondary development of OpenFOAM.
And the Fig.6 is the simulation results after 350 time steps.

Compare the displacements between simulation and experiment at each load, the maximum error is smaller than 5%.
For the research of the diaphragm capsule packaged in vacuum pressure sensor, the integrated use of CFD, finite element software , finite element analysis software for the analysis and calculation may make forecast with high efficiency and precision.
Fig.7 The Light episodic characteristic test device Comparison of Simulation and Experiment The simulation and experimental results of the lower diaphragm center displacement are shown in table 2.
The simulation and experimental results of the diaphragm capsule’s elastic characteristic is shown in figure 8.
The results of simulation and experiment show that this simulation algorithm is feasible and highly precise.

Numerical Simulation Of Burner For Micro Gas Turbine Jia Lei,Liu Shi,Huang Yaosong,Wang Neng,Wang Fuzhen,Li Zhihong Energy Power and Mechanical Engineering Institute, North China Electric Power University, Beijing, China, 102206 Jialei1025@126.com Keywords:Micro gas turbine; Oxy-fuel combustion; Burner; Numerical simulation; Fluent Abstract.
Numerical simulation was used to study flow field and combustion conditions.
Computational fluid dynamics simulation is a important method of testing performance of burners [3].Condition of flow field and temperature filed can be forecasted through simulation, thereby providing guidance for optimization of burners.
Duty methane 2.duty air 3.main methane 4.primary main air 5.Secondary main air 6.axial swirl burner A 7.axial swirl burner B 8.outer wall of combustion chamber Table 1 Tilt angle of axial swirl burners Burner swirler A swirler B Ⅰ 30° 30° Ⅱ 40° 40° Ⅲ 50° 50° Table 2 Parameters of axial swirlers Prameter swirler A swirler B Internal diameter (mm) 5 20 External diameter(mm) 12 34 Blade number 6 12 Blade thickness (mm) 0.5 0.5 Numerical Simulation Numerical Simulation was carried out by computational fluid dynamics software Fluent.
[6] Dudebout R，Reynolds B，Molla-Hosseini K．Integrated Process for CFD modeling and optimization of gas turbine combustors [C]．Proceedings of ASME Turbo Expo 2004：Power for Land，Sea and Air，Vienna，Austria，2004

Extensive CFD modelling of cooling using nitrogen jets showed that an array of high velocity gas jets close to its surface could cool the part at a similar speed to oil.
The model When the rig had been constructed it was modelled in three dimensions with Fluent 6.0.12 CFD code.
The heat transfer data from Fluent was therefore applied to a carburised section in a metallurgical simulation program (Dante).

Fig. 1 Human mouth-throat model 1.2 Governing equations 1.2. 1 Governing equations of the gas phase The large eddy simulation used in the paper is a transition between direct numerical simulations and theoretical model simulations.
The results show that the numerical simulation data are in reasonable agreement with experimental measurements, which verifies that the large eddy simulation methods are accurate and reasonable.
The following conclusion can be drawn: 1) Large eddy simulation data are in reasonable agreement with Particle Image Velocimetry (PIV)experimental measurements, which verifies that the simulation methods are accurate and reasonable.
CFD simulation of aerosol deposition in an anatomically based human large-medium airway model.
Large eddy simulation of inhaled particle deposition within the human upper respiratory tract.

Implementation about Virtual Experiment for Development of Local Shockwave Liu Xueweia, Luo Kaib, Yang Yuemingc, Song Liminc, Jin Jun c Aviation University of Air Force,Changchun 130022,China alisong_1@126.com, bliminsong_2012@163.com, climi_2014@sina.com Keywords: Virtual Experiment；Local Shockwave；Aerodynamics；Software Design Abstract: The virtual experiment for development of local shockwave, which is one of a series of virtual experiment software that have been accomplished based on numerical simulation and modern computer technologies by the authors, was taken as an example, the design principles, modules constitution, developing tools, and experiment courses were introduced.
Developing Aerodynamics or Fluid Mechanics virtual experiment software by applying modern CFD[3] and computer technologies, letting students carry on experiments under virtual circumstances, is an effectual approach to solve the above problem, and development and application of virtual experiments will influence practical teaching revolutionarily.
Based on virtual environments (simulation platforms), virtual experiments are focusing on interactive operations and simulation of experimental results[5].The emergence of virtual experiments helps to develop students' learning interest, broaden the students' knowledge, and boost theoretical knowledge studying effectively.
In order to enhance emulational degree, the numerical simulation results based on computational fluid dynamics were corrected by consulting the real experimental results and a variety of professional documents.
The Role of Computer Simulation Experiments in Physics Experiments Teaching.

Based on the regional climate characteristics in Chongqing, simulation has been carried out by ENVI-met software.
In 1960s, the application of wind tunnel promoted the development of building wind environment simulation, so as to closely link the research on outdoor wind environment and architecture aerodynamics.
With the rapid progress of computer simulation technology, professional scholars verified the simulation of Fluid Mechanics Computation was more easy to operate, convenient and flexible than wind tunnel simulation through many times of experiments and computer simulation, so it is more widely applied to the research on the external wind of group buildings[1].
Study on the present situation of wind heat environment in Jiefangbei commercial Pedestrian Street 3.1 Modeling and parameter setting Fig. 1：The construction of ENVI - MET model Based on the size of Jiefangbei commercial Pedestrian Street, the location and height of surrounding buildings and other information, this paper carries on CFD analysis grating and analysis model in ENVI-met according to the actual distribution of green plants and surface material properties in Jiefangbei commercial Pedestrian Street (Fig.1).
(2) It can be seen that outdoor thermal comfort in Jiefangbei commercial Pedestrian Street in summer is bad from the thermal comfort simulation results.

NUMERICAL SIMULATION OF LEAKAGE OF OIL IN A SUBMERGED DUCT AND THE BEHAVIOR OF OIL IN A MARINE ENVIRONMENT MOREIRA, Gicelia 1,a, ARAÚJO, Morgana Vasconcellos1,b, BURITI, Cidronia J. de Oliveira 2,c, FARIAS NETO, Severino Rodrigues1,d, LIMA, Antonio Gilson Barbosa 3,e 1Federal University of Campina Grande, Center of Science and Technology, Zip Code 58429-900, Campina Grande, Paraiba, Brazil. 1 Chemical Engineering Department, 2 Process Engineering Post Graduate, 3 Mechanical Engineering Department, agicelia.moreira2009@gmail.com, bmorganamva@gmail.com, cjaneburiti@yahoo.com.br, ds.fariasn@gmail.com, eagblima@pq.cnpq.br Keywords: Computational Fluid Dynamics, submerged pipeline, leakage, CFX.
Therefore, this paper aims to study through numerical simulation the leakage behavior in a pipeline carrying oil in the marine environment using the computational package Ansys CFX®.
The numerical mesh was generated in ICEM CFD 15.0 and has 40510 hexahedral elements.
Table 1: Boundary conditions adopted for simulation Input section in March Output section March Inlet section tube Output section tube Front and back plans Temperature of the fluids (Constant) Speed Uw=0 Static pressure of 1 atm Speed Uo=1.02 e 2.04 (m/s) Static Pressure of 1atm Symetric conduction 298.15 K (25⁰C) Uw = maximum speed of the water, Vo = maximum speed of the oil.
A convergence criterion was adopted of 10-7 kg/s and a time step of 0.01s for a simulation time of 4s.