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A Numerical Study of the Shear-Less Turbulent/Non-turbulent Interface

  • G. Cocconi
  • A. Cimarelli
  • B. Frohnapfel
  • E. De Angelis
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 165)

Abstract

A DNS simulation of an interface between a decaying turbulent flow without mean shear and a quiescent non-turbulent region is presented here. The analysis of the instantaneous fields highlight a complex multi-scale behaviour at the turbulent/non-turbulent interface. According to previous results in the literature, by analysing the enstrophy budgets it is possible to observe that enstrophy propagate from the turbulent region mainly by inviscid process while viscous diffusion is relevant only at the interface.

Keywords

Viscous Dissipation Turbulent Region Integral Time Scale Homogeneous Isotropic Turbulence Viscous Diffusion 
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Copyright information

© Springer International Publishing Switzerland 2016

Authors and Affiliations

  • G. Cocconi
    • 1
  • A. Cimarelli
    • 2
  • B. Frohnapfel
    • 1
  • E. De Angelis
    • 3
  1. 1.ISTM - Institute of Fluid MechanicsKarlsruhe Institute of TechnologyKarlsruheGermany
  2. 2.CIRI - Centro Interdipartimentale di Ricerca Industriale AeronauticaUniversità di BolognaForlìItaly
  3. 3.DIN - Dipartimento Ingegneria Industriale Università di BolognaBolognaItaly

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