Journal of Mechanical Science and Technology

, Volume 26, Issue 12, pp 3843–3847 | Cite as

Source of acceleration intermittency in isotropic turbulence

Article

Abstract

Strong acceleration intermittency in fluid turbulence is interpreted in the context of different supports for local enstrophy and dissipation by introducing a new decomposition of acceleration. This paper proposes a simple Lamb Vortex Model that captures statistical features of acceleration, such as probability density functions, flatness factors, and correlation coefficients, observed in the direct numerical simulation of homogeneous isotropic turbulence.

Keywords

Acceleration intermittency Direct numerical simulation Lamb vortex model 

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Copyright information

© The Korean Society of Mechanical Engineers and Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringYonsei UniversitySeoulKorea
  2. 2.Department of Computational Science and EngineeringYonsei UniversitySeoulKorea
  3. 3.Department of Mechanical and Aerospace EngineeringUCLALos AngelesUSA

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