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Issue ESAIM: Proc.
Volume 16, 2007
CEMRACS 2005 - Computational Aeroacoustics and Computational Fluid Dynamics in Turbulent Flows
Page(s) 77 - 88
DOI http://dx.doi.org/10.1051/proc:2007014
Published online 02 March 2007

ESAIM: Proc., 2007, Vol. 16, pp. 77-88
DOI: 10.1051/proc:2007014

Towards implicit subgrid-scale modeling by particle methods

S. Hickel1, L. Weynans2, N.A. Adams3 and G.-H. Cottet4

1  Institute of Aerodynamics, Technische Universität München, D-85747 Garching, Germany.
2  CEA-DIF, BP 12 91680 Bruyéres-le-Châtel, France.
3  Institute of Aerodynamics, Technische Universität München, D-85747 Garching, Germany.
4  LMC-IMAG, Université Joseph Fourier, BP 53 Grenoble Cédex 9 , France.

sh@tum.de

(Published online: 2 March 2007)

Abstract
The numerical truncation error of vortex-in-cell methods is analyzed a-posteriori through the effective spectral numerical viscosity for simulations of three-dimensional isotropic turbulence. The interpolation kernels used for velocity-smoothing and re-meshing are identified as the most relevant components affecting the shape of the spectral numerical viscosity as a function of wave number. A linear combination of well-known standard kernels leads to new kernels assigned to the specific use for implicit large-eddy simulation of turbulent flows, i.e. their truncation errors acts as subgrid-scale model. Numerical results are provided to show the potential and drawbacks of the approach.


Key words: vortex methods, implicit large-eddy simulation, subgrid-scale modeling


© EDP Sciences, ESAIM 2007


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