We consider L-scheme and Newton based solvers for Biot model under small or large deformation. The mechanical deformation follows the Saint Venant-Kirchoff constitutive law. Further, the fluid compressibility is assumed to be nonlinear. A Lagrangian frame of reference is used to keep track of the deformation. We perform an implicit discretization in time (backward Euler) and propose two linearization schemes for solving the nonlinear problems appearing within each time step: Newton's method and L-scheme. The linearizations are used monolithically or in combination with a splitting algorithm. The resulting schemes can be applied for any spatial discretization. The convergences of all schemes are shown analytically for cases under small deformation. Illustrative numerical examples are presented to confirm the applicability of the schemes, in particular, for large deformation.
@article{arxiv.1905.12996,
title = {Iterative solvers for Biot model under small and large deformation},
author = {Manuel Antonio Borregales and Kundan Kumar and Jan Martin Nordbotten and Florin Adrian Radu},
journal= {arXiv preprint arXiv:1905.12996},
year = {2019}
}