Incompressible limit and rate of convergence for tumor growth models with drift

par Noémi David

mardi 28 févr. 2023, 14:00 → 14:45 Europe/Paris

Fokko Du Cloux (Bâtiment Braconnier, La Doua)

Both compressible and incompressible models of porous medium type have been used in the literature to describe the mechanical aspects of living tissues. Using a stiff pressure law, it is possible to bridge the gap between these two different representations. In the stiff pressure limit, compressible models generate free boundary problems of Hele-Shaw type where saturation holds in the moving domain. In this talk, I will present the study of the incompressible limit for advection-porous medium equations motivated by tumor development. The derivation of the pressure equation in the limit was an open problem for which the strong compactness of the pressure gradient was needed. Then, I will discuss the convergence rate of solutions of the compressible model to solutions of the Hele-Shaw problem.