Variational Multiscale Large Eddy Simulation of Turbulent Flows Using a Two-Grid Finite Element or Finite Volume Method

Volker Gravemeier ()
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Volker Gravemeier: Technical University of Munich, Chair for Computational Mechanics

A chapter in Numerical Mathematics and Advanced Applications, 2006, pp 788-795 from Springer

Abstract: Abstract In this article, variational multiscale large eddy simulation based on multigrid scale-separating operators is presented. Two different scale-separating operators, which are basically applicable within both a finite element and a finite volume method, are proposed for separating large resolved scales and small resolved scales. One of these operators is a projector. Using the multigrid operators for scale separation, dynamic and non-dynamic subgrid-scale modeling approaches are applied to the challenging test case of turbulent flow in a diffuser. Variational multiscale large eddy simulation using a projective multigrid scale-separating operator provides remarkable results already in combination with a simple non-dynamic subgrid-scale modeling approach. Furthermore, this methodical combination turns out to be very efficient with regard to the important aspect of computational cost.

Keywords: Large Eddy Simulation; Parent Grid; Dynamic Smagorinsky Model; Prolongation Operator; Variational Multiscale Method (search for similar items in EconPapers)
Date: 2006
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Persistent link: https://EconPapers.repec.org/RePEc:spr:sprchp:978-3-540-34288-5_77

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DOI: 10.1007/978-3-540-34288-5_77

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