Application of a local SGS model based on coherent structures to complex geometries

H. Kobayashi, F. Ham, X. Wu

Research output: Contribution to journalArticle

61 Citations (Scopus)

Abstract

A coherent structure model (CSM) as a subgrid-scale (SGS) model [Kobayashi, H., 2005. The subgrid-scale models based on coherent structures for rotating homogeneous turbulence and turbulent channel flow. Phys. Fluids 17, 045104] is applied to complex geometries and is assessed its performance in large-eddy simulation. The CSM is one of the local SGS models, which mean herein "no averaging in homogeneous directions". Two types of simulation code are tested for the assessment: a structured-mesh code is used for a flow over a backward-facing step, and an unstructured-mesh one is used for a flow in an asymmetric plane diffuser and for staggered jets in crossflow. For all configurations, the CSM gives good predictions and is almost the same performance as the dynamic models. This local model is simple and stable, and suitable for complex geometries.

Original languageEnglish
Pages (from-to)640-653
Number of pages14
JournalInternational Journal of Heat and Fluid Flow
Volume29
Issue number3
DOIs
Publication statusPublished - 2008 Jun 1

Keywords

  • Coherent structure
  • Complex geometry
  • Large-eddy simulation
  • Subgrid-scale modeling

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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