Unsteady-state effects upon gas combustion in closed vessels with an inert porous medium

1997 ◽  
Vol 33 (1) ◽  
pp. 19-25 ◽  
Author(s):  
A. A. Korzhavin ◽  
V. A. Bunev ◽  
V. S. Babkin
Keyword(s):  
Porous Medium ◽  
Unsteady State ◽  
Gas Combustion ◽  
Inert Porous Medium

Flame zone in gas combustion in an inert porous medium

1982 ◽  
Vol 18 (6) ◽  
pp. 628-631 ◽  
Author(s):  
A. A. Korzhavin ◽  
V. A. Bunev ◽  
R. Kh. Abdullin ◽  
V. S. Babkin
Keyword(s):  
Porous Medium ◽  
Flame Zone ◽  
Gas Combustion ◽  
Inert Porous Medium

scholarly journals Multidimensional computational models of gas combustion in heterogeneous porous medium

2021 ◽  
Vol 2099 (1) ◽  
pp. 012010
Author(s):  
Yu Laevsky ◽  
T Nosova
Keyword(s):  
Porous Medium ◽  
Parabolic Equations ◽  
Computational Models ◽  
Front Propagation ◽  
Original Model ◽  
Gas Mixture ◽  
Heterogeneous Porous Medium ◽  
Gas Combustion ◽  
Piecewise Constant ◽  
System Of Parabolic Equations

Abstract The processes of filtration gas combustion in heterogeneous porous medium is studying. The presence of two opposite modes of front propagation made it possible to stabilize the combustion front in a composite porous medium with piecewise constant porosity. A feature of this study is the presentation of the original model not in the traditional form of a system of parabolic equations, but in the form of integral conservation laws in terms of the temperature of the porous medium, the total gas enthalpy, and the mass of gas mixture, and the fluxes corresponding to these functions.

Ignition of a Filtration Gas Combustion Wave by a Heated Region of a Porous Medium

2019 ◽  
Vol 55 (6) ◽  
pp. 654-660
Author(s):  
E. V. Manzhos ◽  
N. A. Kakutkina ◽  
A. A. Korzhavin ◽  
A. D. Rychkov ◽  
P. K. Senachin
Keyword(s):  
Porous Medium ◽  
Combustion Wave ◽  
Heated Region ◽  
Gas Combustion

Effect of Channelling in a Porous Medium on Radionuclide Migration

1982 ◽  
Vol 15 ◽  
Author(s):  
Asit K. Ray ◽  
Shyam Nair
Keyword(s):  
Porous Medium ◽  
Anisotropic Diffusion ◽  
Diffusion Processes ◽  
Convective Diffusion ◽  
Unsteady State ◽  
Rock Matrix ◽  
Radionuclide Migration ◽  
Discharge Rates ◽  
Channel Thickness ◽  
And Diffusion

ABSTRACTA mathematical model has been developed to study the effect of channelling in a porous medium surrounding a repository on the migration of radionuclides. The porous medium is treated as an infinite medium containing parallel, unconnected channels; each channel is surrounded by a rock matrix. The migration in the channel is controlled by convection and diffusion processes in the direction of the flow, whereas in the rock matrix it is dominated by anisotropic diffusion in the longitudinal and transverse directions. Unsteady state convective-diffusion equations for this system have been solved. At the channel-rock matrix interface the concentration and flux were watched to obtain concentration profiles and discharge rates at downstream locations. By means of a parametric study the effects of channel thickness, diffusion coefficients, and flow velocity on the migration rate are elucidated.

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