A new high-order discontinuous galerkin solver for DNS and LES of turbulent incompressible flow

Martin Kronbichler, Benjamin Krank, Niklas Fehn, Stefan Legat, Wolfgang A. Wall

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

We present recent developments within a high-performance discontinuous Galerkin solver for turbulent incompressible flow. The scheme is based on a high-order semi-explicit temporal approach and high-order spatial discretizations. The implementation is entirely matrix-free, including the global Poisson equation, which makes the solution time per time step essentially independent of the spatial polynomial degree. The algorithm is designed to yield high algorithmic intensities, which enables high efficiency on current and future CPU architectures. The method has previously been applied to DNS and ILES of turbulent channel flow and is in the present work used to compute flow past periodic hills at a hill Reynolds number of ReH=10595. We also outline our on-going work regarding wall modeling via function enrichment within this framework.

Original languageEnglish
Title of host publicationNew Results in Numerical and Experimental Fluid Mechanics XI - Contributions to the 20th STAB/DGLR Symposium
EditorsAndreas Dillmann, Claus Wagner, Gerd Heller, Ewald Kramer, Stephan Bansmer, Rolf Radespiel, Richard Semaan
PublisherSpringer Verlag
Pages467-477
Number of pages11
ISBN (Print)9783319645186
DOIs
StatePublished - 2018
Externally publishedYes
Event20th STAB/DGLR Symposium on New Results in Numerical and Experimental Fluid Mechanics, 2016 - Braunschweig, Germany
Duration: 8 Nov 20169 Nov 2016

Publication series

NameNotes on Numerical Fluid Mechanics and Multidisciplinary Design
Volume136
ISSN (Print)1612-2909

Conference

Conference20th STAB/DGLR Symposium on New Results in Numerical and Experimental Fluid Mechanics, 2016
Country/TerritoryGermany
CityBraunschweig
Period8/11/169/11/16

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