Numerical Investigation of Stratified Turbulence

S. Remmler, S. Hickel

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

Abstract

In order to evaluate turbulence subgrid-scale models for stably stratified flows, we performed direct numerical simulations (DNS) of homogeneous stratified turbulence with large-scale horizontal forcing. In these simulations we found that energy dissipation is concentrated within thin layers of horizontal tagliatelle-like vortex sheets between large pancake-like structures. For large eddy simulation (LES), we use an implicit subgrid-scale model, based on the Adaptive Local Deconvolution Method (ALDM). Our analysis proves that the implicit turbulence modelALDMcorrectly predicts the turbulence energy budget and the energy spectra of stratified turbulence, even though dissipative structures are not resolved on the computational grid.

Original languageEnglish
Title of host publicationHigh Performance Computing in Science and Engineering
Subtitle of host publicationTransactions of the High Performance Computing Center, Stuttgart (HLRS) 2012
PublisherSpringer
Pages415-430
Number of pages16
ISBN (Electronic)9783642333743
ISBN (Print)9783642333736
DOIs
Publication statusPublished - 1 Jan 2013
Externally publishedYes

Fingerprint Dive into the research topics of 'Numerical Investigation of Stratified Turbulence'. Together they form a unique fingerprint.

Cite this