Spectral eddy viscosity of stratified turbulence

Sebastian Remmler, Stefan Hickel

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

Abstract

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.

Original languageEnglish
Title of host publicationInternational Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013
PublisherTSFP-8
Volume2
ISBN (Electronic)9780000000002
Publication statusPublished - 1 Jan 2013
Externally publishedYes
Event8th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013 - Poitiers, France
Duration: 28 Aug 201330 Aug 2013

Conference

Conference8th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013
CountryFrance
CityPoitiers
Period28/08/1330/08/13

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