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Spliss: Transparent Integration of Heterogenous HPC Architectures into CFD Solvers and Applications

Wagner, Michael and Krzikalla, Olaf and Rempke, Arne and Gerhold, Thomas (2021) Spliss: Transparent Integration of Heterogenous HPC Architectures into CFD Solvers and Applications. In: Methods, Tools and Technologies for Design in Aviation. Methods, Tools and Technologies for Design in Aviation, 22.-24. Nov. 2021, Barcelona, Spanien.

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Abstract

Solving linear equation systems is an integral part of implicit methods in computational fluid dynamics (CFD). It affects their numerical robustness as well as their computational efficiency. The efficient solving of large linear systems that result from the discretization of the Reynolds-averaged Navier-Stokes equations (RANS) in CFD methods requires algorithms that are well adapted to the specific numerical problems, which is usually not covered by generic solver libraries. The Sparse Linear System Solver (Spliss) aims to provide a linear solver library that, on the one hand, is tailored to requirements of CFD applications but, on the other hand, independent of the particular CFD solver. Focusing on the specific task of solving linear systems allows for integrating more advanced, but also more complex, hardware-specific optimizations, while at the same time hiding this complexity from the CFD solver. One example is the usage of GPUs. Spliss enables the execution of the computationally intensive linear solver on GPUs in a transparent way. This way, the CFD solver can leverage GPUs without the necessity of any code adaption. We share our efforts and experiences in evaluating performance and scalability of Spliss using CODA as an example. CODA is a CFD solver for aircraft aerodynamics developed by DLR, ONERA, and Airbus, and one of the key next-generation engineering applications represented in the European Centre of Excellence for Engineering Applications (EXCELLERAT). We evaluate first results on an AMD HPC system and a GPU cluster to study correctness and performance.

Item URL in elib:https://elib.dlr.de/147266/
Document Type:Conference or Workshop Item (Speech)
Title:Spliss: Transparent Integration of Heterogenous HPC Architectures into CFD Solvers and Applications
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Wagner, MichaelM.Wagner (at) dlr.dehttps://orcid.org/0000-0002-5767-1716
Krzikalla, OlafOlaf.Krzikalla (at) dlr.deUNSPECIFIED
Rempke, ArneArne.Rempke (at) dlr.deUNSPECIFIED
Gerhold, ThomasThomas.Gerhold (at) dlr.deUNSPECIFIED
Date:23 November 2021
Journal or Publication Title:Methods, Tools and Technologies for Design in Aviation
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Computational Fluid Dynamics, Aerospace, High Performance Computing, Sparse Linear Systems Solver
Event Title:Methods, Tools and Technologies for Design in Aviation
Event Location:Barcelona, Spanien
Event Type:international Conference
Event Dates:22.-24. Nov. 2021
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Efficient Vehicle
DLR - Research area:Aeronautics
DLR - Program:L EV - Efficient Vehicle
DLR - Research theme (Project):L - Virtual Aircraft and  Validation
Location: Dresden
Institutes and Institutions:Institute of Software Methods for Product Virtualization > High Perfomance Computing
Deposited By: Wagner, Dr. Michael
Deposited On:13 Dec 2021 17:08
Last Modified:13 Dec 2021 17:08

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