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t8code - Extreme Scale Adaptive Mesh Refinement with Arbitrary Elements

Holke, Johannes (2019) t8code - Extreme Scale Adaptive Mesh Refinement with Arbitrary Elements. CADS Seminar, 15.10.2019, Forschungszentrum Jülich, Germany.

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Meshes are a core part of almost any numerical simulation code. A good choice of mesh is crucial to obtain accurate and efficient results. Adaptive mesh refinement (AMR) is the process of refining a mesh in regions of interest and coarsening it elsewhere. AMR can significantly improve the accuracy of the solution and simultaneously reduce the number of DOFs and hence the memory footprint and runtime. Managing adaptive meshes in parallel, however, is hard -- especially when the meshes are refined and coarsened frequently. In the past decades the forest-of-trees approach using space-filling-curves has been established as a fast and reliable method that offers both geometric flexibility and excellent parallel scalability. However, it was mostly limited to hexahedral meshes. With the AMR library t8code, we extend this approach to meshes with arbitrary element shapes and refinement patterns. We present our algorithms and their implementation and demonstrate strong and weak scalability to several hundred thousand MPI ranks.

Item URL in elib:https://elib.dlr.de/131408/
Document Type:Conference or Workshop Item (Lecture)
Title:t8code - Extreme Scale Adaptive Mesh Refinement with Arbitrary Elements
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Holke, JohannesGerman Aerospace Center (DLR), Linder Höhe, 51147 Köln, Germanyhttps://orcid.org/0000-0002-2783-3286UNSPECIFIED
Date:15 October 2019
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Adaptive mesh refinement t8code p4est space-filling curve High-performance computing scalability
Event Title:CADS Seminar
Event Location:Forschungszentrum Jülich, Germany
Event Type:Other
Event Dates:15.10.2019
Organizer:Lars Hoffmann and Olaf Stein
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space System Technology
DLR - Research area:Raumfahrt
DLR - Program:R SY - Space System Technology
DLR - Research theme (Project):R - Vorhaben SISTEC (old)
Location: Köln-Porz
Institutes and Institutions:Institut of Simulation and Software Technology
Institut of Simulation and Software Technology > High Performance Computing
Deposited By: Holke, Johannes
Deposited On:09 Dec 2019 12:58
Last Modified:07 Dec 2021 08:56

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