Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
A performance comparison between coupling schemes for poroelasticity
Submission Author:
Hermínio Tasinafo Honório , SC
Co-Authors:
Hermínio Tasinafo Honório, Felipe Miguel Wallner Giacomelli, Aideé Barros, Clovis Maliska, Bruno Martins
Presenter: Hermínio Tasinafo Honório
doi://10.26678/ABCM.COBEM2019.COB2019-0206
Abstract
This paper presents a performance comparison between two of the main coupling strategies for poroelasticity problems. In the fully implicit method, the coupling between fluid flow and geomechanical models is implicitly solved in a single system of equations, whereas the fixed-stress split solves these two models separately (two linear systems) in an iterative cycle for each time step. Classical poroelasticity problems are solved in order to assess computational time spent with the two proposed strategies. For the one-dimensional Terzaghi's poroelastic column, results show that the fully implicit scheme is always faster than the fixed-stress split, but this time saving decreases with grid refinement.
Keywords
poroelasticity, geomechanics, Finite Volume, fixed-stress split, fully implicit scheme
