Data di Pubblicazione:
2022
Citazione:
A nonsymmetric approach and a quasi-optimal and robust discretization for the Biot’s model / A. Khan, P. Zanotti. - In: MATHEMATICS OF COMPUTATION. - ISSN 0025-5718. - 91:335(2022 May), pp. 1143-1170. [10.1090/mcom/3699]
Abstract:
We consider the system of partial differential equations stemming from the time discretization of the two-field formulation of the Biot’s model with the backward Euler scheme. A typical difficulty encountered in the space discretization of this problem is the robustness with respect to various material parameters. We deal with this issue by observing that the problem is uniformly stable, irrespective of all parameters, in a suitable nonsymmetric variational setting. Guided by this result, we design a novel nonconforming discretization, which employs Crouzeix-Raviart and discontinuous elements. We prove that the proposed discretization is quasi-optimal and robust in a parameter-dependent norm and discuss the consequences of this result.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Poroelasticity; Biot?s consolidation model; robustness; quasi-optimalityinf-sup;
Elenco autori:
A. Khan, P. Zanotti
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