An adaptive local deconvolution method for implicit LES with optimized spectral eddy viscosity

Stefan Hickel*, Nikolaus A. Adams, J. Andrzej Domaradzki

*Corresponding author for this work

Research output: Contribution to conferencePaperScientificpeer-review

Abstract

The Adaptive Local Deconvolution Method (ALDM) is a new nonlinear discretization scheme designed for Implicit Large-Eddy Simulation (ILES). Free parameters of a solution-adaptive deconvolution operator allow to adjust the numerical truncation error which acts as implicit subgrid-scale (SGS) model. To assign physically appropriate values to these parameters the spectral numerical viscosity is analyzed. By an automatic optimization employing an evolutionary algorithm a set of parameters was found which yields an excellent spectral match for the numerical viscosity with theoretical predictions. Computational results for forced and decaying three-dimensional homogeneous isotropic turbulence show an excellent agreement with theory and experimental data.

Original languageEnglish
Pages805-810
Number of pages6
Publication statusPublished - 1 Dec 2005
Externally publishedYes
Event4th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 4 - Williamsburg, VA, United States
Duration: 27 Jun 200529 Jun 2005

Conference

Conference4th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 4
Country/TerritoryUnited States
CityWilliamsburg, VA
Period27/06/0529/06/05

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