Numerical Studies on the Inclined Flame Front Break of Filtration Combustion in Porous Media

2013 ◽  
Vol 27 (8) ◽  
pp. 4969-4976 ◽  
Author(s):  
Junchun Zhang ◽  
Leming Cheng ◽  
Chenghang Zheng ◽  
Zhongyang Luo ◽  
Mingjiang Ni
Keyword(s):  
Porous Media ◽  
Flame Front ◽  
Filtration Combustion ◽  
Numerical Studies

scholarly journals A Review on the Control Parameters of Natural Convection in Different Shaped Cavities with and without Nanofluid

Processes ◽  
2020 ◽  
Vol 8 (9) ◽  
pp. 1011 ◽  
Author(s):  
Sara Rostami ◽  
Saeed Aghakhani ◽  
Ahmad Hajatzadeh Pordanjani ◽  
Masoud Afrand ◽  
Goshtasp Cheraghian ◽  
...  
Keyword(s):  
Porous Media ◽  
Natural Convection ◽  
Free Convection ◽  
Forced Convection ◽  
Opposite Effect ◽  
Fluid Velocity ◽  
Experimental Studies ◽  
Effective Parameters ◽  
Magnetic Forces ◽  
Numerical Studies

Natural convection in cavities is an interesting subject for many researchers. Especially, in recent years, the number of articles written in this regard has grown enormously. This work provides a review of recent natural convection studies. At first, experimental studies were reviewed and, then, numerical studies were examined. Then, the articles were classified based on effective parameters. In each section, numerical studies were examined the parameters added to the cavity such as magnetic forces, fin, porous media and cavity angles. Moreover, studies on non-rectangular cavities were investigated. Free convection in enclosures depends more on the fluid velocity relative to the forced convection, leading to the opposite effect of some parameters that should essentially enhance rate of heat transfer. Nanoparticle addition, magnetic fields, fins, and porous media may increase forced convection. However, they can reduce free convection due to the reduction in fluid velocity. Thus, these parameters need more precision and sometimes need the optimization of effective parameters.

Numerical studies of transport in porous media

1993 ◽  
Vol 20 (3) ◽  
pp. 203-224 ◽  
Author(s):  
R.L. Buckley ◽  
S.K. Loyalka ◽  
M.M.R. Williams
Keyword(s):  
Porous Media ◽  
Transport In Porous Media ◽  
Numerical Studies

Simulation of Combustion in Porous Media With a Two-Energy Equation Model

2011 ◽  
Author(s):  
Marcelo J. S. deLemos ◽  
Jose´ E. A. Coutinho
Keyword(s):  
Porous Media ◽  
Flame Front ◽  
Control Volume ◽  
Numerical Technique ◽  
Simple Algorithm ◽  
Equation Model ◽  
Gas Temperature ◽  
Inlet Velocity ◽  
Excess Air ◽  
Porous Burner

This work presents numerical results for two-dimensional combustion of an air/methane mixture in inert porous media using turbulence and radiation models. Distinct energy equations are considered for the porous burner and for the fuel in it. Inlet velocity and excess air-to-fuel ratio are varied in order to analyze their effects on temperature and flame front location. The macroscopic equations for mass, momentum and energy are obtained based on the volume average concept. The numerical technique employed for discretizing the governing equations was the control volume method with a boundary-fitted non-orthogonal coordinate system. The SIMPLE algorithm was used to handle the pressure-velocity coupling. Results indicate that for high excess air values, the gas temperature peaks are reduced. Also, for the same conditions the flame front moves towards the exit of the burner. Results also indicate that the same flame front behavior occurs as the inlet velocity increases.

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