Spectral eddy viscosity of stratified turbulence

Sebastian Remmler; Stefan Hickel

Spectral eddy viscosity of stratified turbulence

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-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 language	English
Title of host publication	International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013
Publisher	TSFP-8
Volume	2
ISBN (Electronic)	9780000000002
Publication status	Published - 1 Jan 2013
Externally published	Yes
Event	8th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013 - Poitiers, France Duration: 28 Aug 2013 → 30 Aug 2013

Conference

Conference	8th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013
Country/Territory	France
City	Poitiers
Period	28/08/13 → 30/08/13

Cite this

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title = "Spectral eddy viscosity of stratified turbulence",

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.",

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AU - Remmler, Sebastian

AU - Hickel, Stefan

PY - 2013/1/1

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N2 - 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.

AB - 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.

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M3 - Conference contribution

AN - SCOPUS:85034233245

VL - 2

BT - International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013

PB - TSFP-8

T2 - 8th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013

Y2 - 28 August 2013 through 30 August 2013

ER -

Spectral eddy viscosity of stratified turbulence

Abstract

Conference

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