Large eddy simulation of passive scalar in complex turbulence with flow impingement and flow separation

Ken Ichi Abe, Kazuhiko Suga

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In order to reveal unknown characteristics of complex turbulent passive scalar fields, large eddy simulations in forced convection regimes were performed under several strain conditions, including a flow impingement and a flow separation. By using the simulation results, relations between the dynamic and scalar fields were carefully examined. It was then confirmed that the scalar was transported by a large vortex structure near the examined regions wherever the mean shear vanished, though in the high shear regions, the scalar transport was governed by a coherent structure due to the high shear strain. In addition, a priori explorations were attempted by processing the data, focusing on the derivation of a possible direction for modeling the passive scalar transport in complex strain fields algebraically. The a priori tests suggested that an expanded form of the GGDH model introducing quadratic products of the Reynolds stresses was promising for general flow cases.

Original languageEnglish
Pages (from-to)1395-1402
Number of pages8
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume65
Issue number632
DOIs
Publication statusPublished - Jan 1 1999
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'Large eddy simulation of passive scalar in complex turbulence with flow impingement and flow separation'. Together they form a unique fingerprint.

  • Cite this