Dissipation scale and control of fine-scale turbulence in a plane mixing layer

Yitshak Zohar, H. O. Chih-Ming

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

The entrainment of fluids from two streams into the shear region of an incompressible mixing layer is dominated by the evolution of large coherent structures. However, fine-scale mixing of the entrained fluids mainly occurs at the interfaces of the small-scale turbulence. In this investigation, experiments were conducted to understand the properties of the small scales and to explore a method for controlling the population of the fine-scale turbulence. Furthermore, a dissipation scale, ζ, is found from the zero-crossing of the time derivative of the velocity fluctuations. This scale characterizes the most probable size of fine-scale turbulence, which produces most of the viscous dissipation.

Original languageEnglish (US)
Pages (from-to)139-161
Number of pages23
JournalJournal of Fluid Mechanics
Volume320
DOIs
StatePublished - Aug 10 1996
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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