Repository: Freie Universität Berlin, Math Department

Spectral eddy viscosity of stratified turbulence

Remmler, S. and Hickel, S. (2014) Spectral eddy viscosity of stratified turbulence. Journal of Fluid Mechanics . (In Press)

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The analysis of the spectral eddy viscosity is a handy tool to analyze the performance of LES methods. It reflects the cumulated effect of numerical discretization and turbulence subgrid-scale model on the spectral energy transfer. We compute this quantity by filtering and truncating data from direct numerical simulations of neutrally and stably stratified homogeneous turbulence. The results are used for testing of implicit and explicit LES methods. We find indications that for stably stratified turbulence it is necessary to use different subgrid-scale models for the horizontal and vertical velocity components.

Item Type:Article
Additional Information:In press
Subjects:Mathematical and Computer Sciences > Mathematics > Applied Mathematics
ID Code:1430
Deposited By: Ulrike Eickers
Deposited On:01 Aug 2014 09:43
Last Modified:01 Aug 2014 10:12

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