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Study on Numerical Simulation of Gas Explosion inside Compression Compartment of Gas Filling Station Wang yu1, a, Wu yunyi2,b 1Dept. of Safety Engineering, Technology Institute of Sichuan Normal University, Chengdu, China 2Sinopec Gas Branch, Beijing, China a cawn229@sohu.com, b 249369974@qq.com Keywords: Compression Compartment; Gas Explosion; Numerical Simulation; Ignition Source; Abstract.
In this paper, numerical simulation was adopted to build 3D model of compression compartment and simulate gas explosion pressure and flame propagation behavior under different ignition point location, open-pressure and weight of relief panels.
CFD calculation model The finite volume method is adopted to solve N-S equation under 3D Cartesian grid.
However, from the simulation results, the largest explosion pressure in the compression compartment of this case is between 6.7kPa and 60kPa, while the damage pressure of ordinary glass in explosion is 2-7kPa.
Modelling of turbulence and combustion for simulation of gas explosion in complex geometries[D].

Investigation on Laminar Flow Field Performances in a Dual-Impeller Stirred Tank Deyu Luan1,a, Shenjie Zhou2,b and Songying Chen2,c 1 School of Electromechanical Engineering, Qingdao University of Science and Technology, Qingdao, 266061, China 2 School of Mechanical Engineering, Shandong University, Jinan, 250061, China aqddy05@163.com, bzhousj@sdu.edu.cn, cchensy66@sdu.edu.cn Keywords: dual-impeller, stirred tank, laminar model, numerical simulation, layer clearance Abstract: The 3D flow field generated by a dual-impeller in the agitation of glycerin fluid was simulated using the commercial CFD package.
In this study, We focus on the performance of a dual-impeller stirred tank with four different combinations using CFD Fluent V6.3® software.
Both regions were discretized by unstructured tetrahedral grid (Fig.1) for the simulation, in which the rotorregion adopted finer grids with the grid cell numbers of 346,000 or so, while the static region used relatively coarse grids with the grid cell numbers of 358,000 around.

Numerical simulations are one way to obtain a better and more detailed understanding of the chemical vapor deposition process of silicon carbide.
Using numerical simulations, e.g. computational fluid dynamics (CFD), is one way of obtaining this understanding.
The chemical reaction models are implemented in commercial CFD software and tested in a 2D geometry of a horizontally oriented CVD reactor.
Alternatively, as is done in the simulations here, a deposition model that completely separates the different molecules can be used.
Experimentally, at the conditions used in the simulations, silicon limited growth is expected, at least for C3H8 as carbon precursor.

., Centrum excellence Telc, Batelovska 485, Telc, 58 856, Czech Republic avladimira.michalcova@vsb.cz, bkuznetsov@itam.cas.cz, clenka.lausova@vsb.cz, diveta.skotnicova@vsb.cz Keywords: aerodynamics, wind tunnel contraction, CFD Abstract.
Suitable numerical models were chosen on the basis of experimental results to define the theoretical flow characteristics of a simulation process in the enclosed chamber of the nozzle.
Skotnicova, Analysis of experimental measurements and numerical simulations of a heat field in the light weight building structure, Advaced Materials Research, 2014, Vol. 969, pp. 33-38
Kozubkova, Investigation of viscous fluid flow in an eccentrically deposited annulus using CFD methods, In: Proceeding of the 8th International Conference on Experimental Fluid Mechanics, 2014, Kutna Hora, Czech Republic

From the standpoint of CFD, this paper analyses the hydraulic clamping phenomenon and the effect of different kinds of pressure-equalizing grooves on hydraulic clamping force based on Fluent.
Fig. 5 Three-dimensional models for simulation Generate Mesh.
Then do the simulation for spool with one or three rectangular grooves.
Then do the simulation for spool with three triangular grooves.
[4] Fujun Wang: Principle and Application of CFD Software.

The temperature distribution is usually modeled using a thermal analysis with a surface heat flux [7] or a CFD model, which considers the effect of material movement on temperature gradient [8].
In Eulerian method, there is no problem with mesh distortion as in a Lagrangian method and it has been used earlier for themomechanical simulations in drawing and rolling processes [6].
Shercliffa, 3-Dimensional CFD Modelling of flow round a threaded friction stir welding tool profile, J.
Reynolds, Parametric studies of friction stir welding by commercial fluid dynamics simulation, Sci Tech Weld Join. 11 (2006) 200-209
Analysis of transient temperature and residual thermal stresses in friction stir welding of aluminum alloy 6061-T6 via numerical simulation.

Numerical Simulation Study of Metal Transfer in MIG Welding with Magnetic Control Chao Yang1,a ,Shuyuan Jiang1,b, Haibo Bi1 1Institute of Aviation Manufacturing Engineering, Nanchang Hangkong University, Nanchang 330063, China a cyang25@163.com， b jsy80131@163.com Keywords: magnetic control, MIG welding, metal transfer, numerical simulation Abstract: This paper simulate the mode of metal transfer in MIG magnetic control welding by using CFD software FLUENT, establishing mathematical model based on fluid dynamics and electromagnetic theory, and simulate the form, grow and drop process of metal transfer with and without magnetic.
Recently, many scholars have deeply analyzed and made some strides in numerical simulation of drop transfer [3-4].
But the model of metal transfer have not been reported by using numerical simulation in MIG welding with longitudinal magnetic field, so this paper simulates the of metal transfer mode, by using software FLUENT, analyzing the magnetic field how to affect drop transfer.
Fig.5 Diameter change of drop transfer Fig.6 Height change of drop transfer with additional 1.8mT magnetic field with additional 1.8mT magnetic field Conclusions 1) Established the model of drop transfer in MIG welding with and without magnetic field by using FLUENT software, and the simulations under the condition of having 1.8mT magnetic field and without are come true.
Numerical Simulation and Control of Molten Droplet Shape in Short-circuit CO2 Arc Weld [J].

The finite volume method, by means of CFD FLUENT, is applied in this contribution.
The grid independence tests were performed by realizing CFD simulations in the domain examined, using different structured quadrilateral-type grid systems with the number of mesh nodes ranging from 35 to 145 along the channel depth and 95 to 370 along the length.
(iii) The rest of this research work could also be oriented towards three-dimensional modeling and simulation studies of the entire plane air solar collector.
Shi, Performance comparison of rod-baffle and segment-baffle heat exchangers using numerical simulations, Applied Mechanics and Materials 595 (2014) 128-133
Kang, Numerical simulation of flow fields in different baffled flocculation reactors, Advanced Materials Research 550-553 (2012) 3037-3040

Carsonb School of Engineering, University of Waikato, Private Bag 3105, Hamilton 3240, New Zealand athomasarchbold3@gmail.com, bjkcarson@waikato.ac.nz Keywords: Computational Fluid Dynamics (CFD), Cyclone Separation, Multiphase Flow Modelling Abstract.
Because of the opposing geometry of the kernel and shell particles, a new framework is derived using CFD simulations to predict the drag coefficient of the shell particle as a function of orientation and Reynolds number.
All simulations of the particle behaviour were executed using a version of ANSYS Fluent 17.0.
The drag coefficients obtained from simulations were approximated by a function of best fit (Eq. 24).
The maximum percentage difference between the simulation results and the approximated model is 23.7%.

Numerical simulation and analysis of 3-D internal flow field In mechanical turbulent coal pulverizer Wei Lv1,a , Zhi-yue Yao1,b , De-li Zhang1, Xin-hai Wang1, Xiao-nan Zhang1, and Zhong-xia Zhao1 1School of machinery and power engineering, Harbin University of Science and Technology, Harbin 150080, China aziyi2011@sina.com, byaozhiyue@sina.com Keywords: turbulent coal pulverizer; numerical simulation; pressure; velocity Abstract.In this paper, the computation fluid dynamics ( CFD) software FLUENT is applied to analyze the internal 3-D gas flow of the mechanical turbulent coal pulverizer impeller, especially on the pressure and velocity distribution.
Fig. 7 Pressure distribution of wall surface Fig. 8 Velocity distribution in z = 35 mm Fig. 9 Velocity distribution of tooth circle section Fig. 10 Velocity distribution of export section Conclusions In this paper , single-phase flow fields of coal pulverizer were investigated by numerical simulation.
Fluid simulation calculation example and application in FLUENT[M].Beijing:Beijing institute of technology press,2004:285—296
Numerical simulation of three-dimensional flow field of centrifugal fan[J].