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Mathematical Simulation of Thermomechanics in an Impermeable Porous Medium

Authors: Alekseev M.V., Sudobin N.G., Kuleshov A.A., Savenkov E.B. Published: 07.08.2020
Published in issue: #4(91)/2020  
DOI: 10.18698/1812-3368-2020-4-4-23

 
Category: Mathematics | Chapter: Computational Mathematics  
Keywords: mathematical simulation, thermomechanics, phase equilibrium, chemical kinetics, thermal decomposition, kerogen, porous medium

The paper reports on mathematically simulating behaviour of a porous medium featuring isolated interstices filled with a chemically active substance by using a mathematical model of thermomechanics in the matrix and thermochemical processes inside the pores. We used three-dimensional thermomechanical equations to describe the behaviour of the medium. A lumped-element model accounting for chemical reactions and phase equilibrium describes the processes in pores. We outline the mathematical model of the medium and the respective computational algorithm. We provide parametric computation results using realistic thermophysical and thermodynamical parameters, composition of the organic substance found inside pores (products of thermal decomposition of kerogen) and chemical reactions, which show that it is necessary to employ complex, interconnected models to simulate the process class under consideration

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