Mathematical properties of the foam flow in porous media

LF Lozano, RQ Zavala, G Chapiro - Computational Geosciences, 2021‏ - Springer
Foam is used in enhanced oil recovery to improve the sweep efficiency by controlling the
gas mobility. A common way to describe the foam displacement is by using population …

Traveling wave solutions describing the foam flow in porous media for low surfactant concentration

RQ Zavala, LF Lozano, G Chapiro - Computational Geosciences, 2024‏ - Springer
We present a foam displacement model with a separate balance equation for the surfactant
concentration in the aqueous phase. We consider the gas mobility that depends on the …

Riemann solutions for counterflow combustion in light porous foam

G Chapiro, L Senos - Computational and Applied Mathematics, 2018‏ - Springer
The paper is motivated by a model for the injection of air into a porous medium that contains
a solid fuel. In previous work, a system of three evolutionary partial differential equations that …

Traveling waves in a simplified gas-solid combustion model in porous media

F Ozbag, S Schecter, G Chapiro - 2018‏ - projecteuclid.org
We study the combustion waves that occur when air is injected into a porous medium
containing initially some solid fuel and prove the existence of traveling waves using phase …

Classification of the traveling wave solutions for filtration combustion considering thermal losses

RQ Zavala, G Chapiro - Combustion and Flame, 2020‏ - Elsevier
In the mathematical modeling of solid fuel combustion, thermal losses are commonly
neglected to allow a rigorous analysis. In this work, different choice of simplifications was …

The effect of thermal losses on traveling waves for in-situ combustion in porous medium

G Chapiro, D Marchesin - Journal of Physics: Conference Series, 2015‏ - iopscience.iop.org
We study a model for the injection of air into an underground porous medium that contains a
solid fuel. In our previous works the model was simplified and all wave sequences for the …

Numerical solution of a class of moving boundary problems with a nonlinear complementarity approach

G Chapiro, AER Gutierrez, J Herskovits… - Journal of Optimization …, 2016‏ - Springer
Parabolic-type problems, involving a variational complementarity formulation, arise in
mathematical models of several applications in Engineering, Economy, Biology and different …

Stability of combustion waves in a simplified gas–solid combustion model in porous media

F Ozbag, S Schecter - Philosophical Transactions of the …, 2018‏ - royalsocietypublishing.org
We study the stability of the combustion waves that occur in a simplified model for injection
of air into a porous medium that initially contains some solid fuel. We determine the essential …

Asymptotic approximation for counterflow combustion in porous media

G Chapiro, AJ de Souza - Applicable Analysis, 2016‏ - Taylor & Francis
Air injection and in situ combustion have long been considered as potential techniques for
displacement and recovery of medium and heavy oil. They utilize heavy and immobile oil …

[کتاب][B] Stability analysis of combustion waves in porous media

F Ozbag - 2016‏ - search.proquest.com
This thesis is devoted to the analysis of combustion waves that occur when air is injected
into a porous medium containing initially some fuel. Our analysis consists of showing …