| Issue |
ESAIM: Proc.
Volume 16, 2007
CEMRACS 2005 - Computational Aeroacoustics and Computational Fluid Dynamics in Turbulent Flows
|
|
|---|---|---|
| Page(s) | 77 - 88 | |
| DOI | https://doi.org/10.1051/proc:2007014 | |
| Published online | 02 March 2007 | |
Towards implicit subgrid-scale modeling by particle methods
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.
Corresponding author: sh@tum.de
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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