Large-scale simulation of mantle convection based on a new matrix-free approach

Journal article


Publication Details

Author(s): Bauer S, Huber M, Ghelichkhan S, Mohr M, Rüde U, Wohlmuth BI
Journal: Journal of Computational Science
Publisher: Elsevier
Publication year: 2019
Volume: 31
Pages range: 60--76
ISSN: 1877-7503


Abstract

In this paper, we report on a two-scale approach for efficient matrix-free finite element simulations. It is an extended version of our previous conference publication [1]. The proposed method is based on surrogate element matrices constructed by low order polynomial approximations. It is applied to a Stokes-type PDE system with variable viscosity as is a key component in mantle convection models. We set the ground for a rigorous performance analysis inspired by the concept of parallel textbook multigrid efficiency and study the weak scaling behavior on SuperMUC, a peta-scale supercomputer system. For a complex geodynamical model, we achieve, on up to 47 250 compute cores, a parallel efficiency of 93% for application of the discrete operator and 83% for a complete Uzawa V-cycle including the coarse grid solve. Our largest simulation uses a trillion (O (10 12)) degrees of freedom for a global mesh resolution …



FAU Authors / FAU Editors

Huber, Markus
Lehrstuhl für Informatik 10 (Systemsimulation)
Rüde, Ulrich Prof. Dr.
Lehrstuhl für Informatik 10 (Systemsimulation)


External institutions with authors

Ludwig-Maximilians-Universität (LMU)
Technische Universität München (TUM)


How to cite

APA:
Bauer, S., Huber, M., Ghelichkhan, S., Mohr, M., Rüde, U., & Wohlmuth, B.I. (2019). Large-scale simulation of mantle convection based on a new matrix-free approach. Journal of Computational Science, 31, 60--76. https://dx.doi.org/10.1016/j.jocs.2018.12.006

MLA:
Bauer, Simon, et al. "Large-scale simulation of mantle convection based on a new matrix-free approach." Journal of Computational Science 31 (2019): 60--76.

BibTeX: 

Last updated on 2019-21-03 at 14:53