Existence of a global weak solution for a reaction-diffusion problem with membrane conditions - Inria - Institut national de recherche en sciences et technologies du numérique
Journal Articles Journal of Evolution Equations Year : 2020

Existence of a global weak solution for a reaction-diffusion problem with membrane conditions

Abstract

Several problems, issued from physics, biology or the medical science, lead to parabolic equations set in two sub-domains separated by a membrane with selective permeability to specific molecules. The corresponding boundary conditions, describing the flow through the membrane, are compatible with mass conservation and energy dissipation, and are called the Kedem-Katchalsky conditions. Additionally, in these models, written as reaction-diffusion systems, the reaction terms have a quadratic behaviour. M. Pierre and his collaborators have developed a complete $L^1$ theory for reaction-diffusion systems with different diffusions. Here, we adapt this theory to the membrane boundary conditions and prove the existence of weak solutions when the initial data has only $L^1$ regularity using the truncation method for the nonlinearities. In particular, we establish several estimates as the $W^{1,1}$ regularity of the solutions. Also, a crucial step is to adapt the fundamental $L^2$ (space, time) integrability lemma to our situation.
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Dates and versions

hal-02905180 , version 1 (23-07-2020)
hal-02905180 , version 2 (08-09-2020)
hal-02905180 , version 3 (19-10-2020)
hal-02905180 , version 4 (24-06-2022)

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Cite

Giorgia Ciavolella, Benoît Perthame. Existence of a global weak solution for a reaction-diffusion problem with membrane conditions. Journal of Evolution Equations, 2020, 21, pp.1513-1540. ⟨10.1007/s00028-020-00633-7⟩. ⟨hal-02905180v4⟩
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