Scalable block preconditioners for saturated thermo-hydro-mechanics problems

Ana C. Ordonez; Nicolas Tardieu; Carola Kruse; Daniel Ruiz; Sylvie Granet

doi:10.1186/s40323-023-00245-z

Scalable block preconditioners for saturated thermo-hydro-mechanics problems

Ana C. Ordonez, Nicolas Tardieu, Carola Kruse, Daniel Ruiz, Sylvie Granet

Research output: Contribution to journal › Article › peer-review

Abstract

We are interested in the modelling of saturated thermo-hydro-mechanical (THM) problems that describe the behaviour of a soil in which a weakly compressible fluid evolves. It is used for the evaluation of the THM impact of high-level activity radioactive waste exothermicity within a deep geological disposal facility. We shall present the definition of a block preconditioner with nested Krylov solvers for the fully coupled THM equations. Numerical results reflect the good performance of the proposed preconditioners that show to be weakly scalable until more than 2000 cores and more than 1 billion degrees of freedom. Thanks to their performance and robustness, a real waste storage problem on a scale, to our knowledge, unprecedented in the field, can be addressed.

Original language	English
Article number	10
Journal	Advanced Modeling and Simulation in Engineering Sciences
Volume	10
Issue number	1
DOIs	https://doi.org/10.1186/s40323-023-00245-z
Publication status	Published - 1 Dec 2023
Externally published	Yes

Keywords

Finite element
High performance computing
Multiphysics
Preconditioning

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10.1186/s40323-023-00245-z

Cite this

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title = "Scalable block preconditioners for saturated thermo-hydro-mechanics problems",

abstract = "We are interested in the modelling of saturated thermo-hydro-mechanical (THM) problems that describe the behaviour of a soil in which a weakly compressible fluid evolves. It is used for the evaluation of the THM impact of high-level activity radioactive waste exothermicity within a deep geological disposal facility. We shall present the definition of a block preconditioner with nested Krylov solvers for the fully coupled THM equations. Numerical results reflect the good performance of the proposed preconditioners that show to be weakly scalable until more than 2000 cores and more than 1 billion degrees of freedom. Thanks to their performance and robustness, a real waste storage problem on a scale, to our knowledge, unprecedented in the field, can be addressed.",

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T1 - Scalable block preconditioners for saturated thermo-hydro-mechanics problems

AU - Ordonez, Ana C.

AU - Tardieu, Nicolas

AU - Kruse, Carola

AU - Ruiz, Daniel

AU - Granet, Sylvie

PY - 2023/12/1

Y1 - 2023/12/1

N2 - We are interested in the modelling of saturated thermo-hydro-mechanical (THM) problems that describe the behaviour of a soil in which a weakly compressible fluid evolves. It is used for the evaluation of the THM impact of high-level activity radioactive waste exothermicity within a deep geological disposal facility. We shall present the definition of a block preconditioner with nested Krylov solvers for the fully coupled THM equations. Numerical results reflect the good performance of the proposed preconditioners that show to be weakly scalable until more than 2000 cores and more than 1 billion degrees of freedom. Thanks to their performance and robustness, a real waste storage problem on a scale, to our knowledge, unprecedented in the field, can be addressed.

AB - We are interested in the modelling of saturated thermo-hydro-mechanical (THM) problems that describe the behaviour of a soil in which a weakly compressible fluid evolves. It is used for the evaluation of the THM impact of high-level activity radioactive waste exothermicity within a deep geological disposal facility. We shall present the definition of a block preconditioner with nested Krylov solvers for the fully coupled THM equations. Numerical results reflect the good performance of the proposed preconditioners that show to be weakly scalable until more than 2000 cores and more than 1 billion degrees of freedom. Thanks to their performance and robustness, a real waste storage problem on a scale, to our knowledge, unprecedented in the field, can be addressed.

KW - Finite element

KW - High performance computing

KW - Multiphysics

KW - Preconditioning

U2 - 10.1186/s40323-023-00245-z

DO - 10.1186/s40323-023-00245-z

M3 - Article

AN - SCOPUS:85163398748

SN - 2213-7467

VL - 10

JO - Advanced Modeling and Simulation in Engineering Sciences

JF - Advanced Modeling and Simulation in Engineering Sciences

IS - 1

M1 - 10

ER -

Scalable block preconditioners for saturated thermo-hydro-mechanics problems

Abstract

Keywords

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