A LATIN computational strategy for multiphysics problems: Application to poroelasticity

David Dureisseix (1) , Pierre Ladevèze (1) , Bernard A. Schrefler (2)

1 LMT - Laboratoire de Mécanique et Technologie
2 Department of Structural and Transportation Engineering Laboratory

Multiphysics phenomena and coupled-field problems usually lead to analyses which are computationally intensive. Strategies to keep the cost of these problems affordable are of special interest. For coupled fluid-structure problems, for instance, partitioned procedures and staggered algorithms are often preferred to direct analysis. In this paper, we describe a new strategy for solving coupled multiphysics problems which is built upon the LArge Time INcrement (LATIN) method. The proposed application concerns the consolidation of saturated porous soil, which is a strongly coupled fluid-solid problem. The goal of this paper is to discuss the effciency of the proposed approach, especially when using an appropriate time-space approximation of the unknowns for the iterative resolution of theuncoupled global problem. The use of a set of radial loads as an adaptive approximation of the solution during iterations will be validated and a strategy for limiting the number of global resolutions will be tested on multiphysics problems.

Mots clés: consolidation; multiphysics; coupled field; LATIN; porous media; fluid-structure interaction

Domaines: Matériaux et structures en mécanique [physics.class-ph]; Matériaux et structures en mécanique [physics.class-ph]; Mécanique des structures [physics.class-ph]

David Dureisseix, Pierre Ladevèze, Bernard A. Schrefler. A LATIN computational strategy for multiphysics problems: Application to poroelasticity. International Journal for Numerical Methods in Engineering, 2003, 56 (10), pp.1489-1510. ⟨10.1002/nme.622⟩. ⟨hal-00321790⟩