Large eddy simulation using an implicit high-order spectral difference method

Matteo Parsani, Ghader Ghorbaniasl, Michael Bilka, Christian Lacor

Onderzoeksoutput: Conference paper

Samenvatting

The filtered fluid dynamic equations are discretized in space by a
high-order spectral difference(SD) method coupled with large eddy
simulation (LES) approach. The subgrid-scale stress tensor is
modelled by the wall-adapting local eddy-viscosity model (WALE). We
solve the unsteady equations by advancing in time using a
second-order backward difference formulae (BDF2) scheme. The
nonlinear algebraic system arising from the time discretization is
solved with the nonlinear lower-upper symmetric Gauss-Seidel
(LU-SGS) algorithm. The accuracy and the
reliability of the solver are tested by solving the 2D "turbulent"
flow around a square cylinder at Re = 2.2 \times
10^{4} and the 3D turbulent flow in a muffler at Re = 4.64 \times
10^{4}. The results show a good agreement with the reference solutions and the experimental
data.
Originele taal-2English
TitelFifth European Conference on Computational Fluid Dynamics (ECCOMAS)
Pagina's1-20
Aantal pagina's20
StatusPublished - 14 jun 2010
EvenementUnknown - Stockholm, Sweden
Duur: 21 sep 200925 sep 2009

Conference

ConferenceUnknown
Land/RegioSweden
StadStockholm
Periode21/09/0925/09/09

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