Spectral structure of stratified turbulence: Direct numerical simulations and predictions by large eddy simulation

Sebastian Remmler, Stefan Hickel

Research output: Contribution to journalArticleScientificpeer-review

21 Citations (Scopus)

Abstract

Density stratification has a strong impact on turbulence in geophysical flows. Stratification changes the spatial turbulence spectrum and the energy transport and conversion within the spectrum. We analyze these effects based on a series of direct numerical simulations (DNS) of stratified turbulence. To facilitate simulations of real-world problems, which are usually beyond the reach of DNS, we propose a subgrid-scale turbulence model for large eddy simulations of stratified flows based on the Adaptive Local Deconvolution Method (ALDM). Flow spectra and integral quantities predicted by ALDM are in excellent agreement with direct numerical simulation. ALDM automatically adapts to strongly anisotropic turbulence and is thus a suitable tool for studying turbulent flow phenomena in atmosphere and ocean.

Original languageEnglish
Pages (from-to)319-336
Number of pages18
JournalTheoretical and Computational Fluid Dynamics
Volume27
Issue number3-4
DOIs
Publication statusPublished - 1 Jun 2013
Externally publishedYes

Keywords

  • Direct numerical simulation
  • Large eddy simulation
  • Stratified turbulence
  • Subgrid-scale modeling

Fingerprint Dive into the research topics of 'Spectral structure of stratified turbulence: Direct numerical simulations and predictions by large eddy simulation'. Together they form a unique fingerprint.

  • Cite this