Large-Eddy Simulation and Multigrid Methods

Sandra Nägele

Interdisciplinary Centre for Scientific Computing
University of Heidelberg
Im Neuenheimer Feld 368
69120 Heidelberg
Germany

Gabriel Wittum

Institute for Computer Science, Heidelberg University, INF 368, D-69120 Heidelberg


Abstract

A method to simulate turbulent flows with Large-Eddy Simulation on unstructured grids is presented. Two kinds of dynamic models are used to model the unresolved scales of motion and are compared with each other on different grids. Thereby the behaviour of the models is shown and additionally the feature of adaptive grid refinement is investigated. Furthermore the parallelization aspect is adressed.

Keywords. LES, turbulence, multigrid,parallelization AMS subject classifications. 65N55, 65Y05, 76F65

This work was supported by the Deutsche Forschungsgemeinschaft, SFB 359 and Center of Applied Scientific Computing at Lawrence Livermore National Laboratories.