Display Abstract
 Title Global in time weak solutions for a nonlinear model for tumor growth.
 Name Donatella Donatella Country Italy Email donatell@gmail.com Co-Author(s) K. Trivisa (University of Maryland) Submit Time 2014-02-27 05:00:32 Session Special Session 37: Global or/and blowup solutions for nonlinear evolution equations and their applications
 Contents We investigate a free boundary problem modeling the growth of tumors cells. The model is given by a multi-phase flow and the tumor is described as a growing continuum $\Omega$ with boundary $\partial \Omega$ both of which evolve in time. In particular the model consists of a nonlinear second-order parabolic equations describing the diffusion of nutrient, and three nonlinear first-order hyperbolic equations describing the evolution of proliferative cells, quiescent cells and dead cells. Global-in-time weak solutions are obtained using an approach based on penalization of the boundary behavior, diffusion and viscosity in the weak formulation.