Vortex stripping and the erosion of coherent structures in two-dimensional flows

Annarita Mariotti*, Bernard Legras, David G. Dritschel

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

116 Citations (Scopus)

Abstract

This paper studies the erosion of a monotonically distributed vortex by the joint action of inviscid stripping, induced by an externally imposed adverse shear, and viscous diffusion, either in the form of Newtonian viscosity or hyperviscosity. It is shown that vortex erosion is greatly amplified by the presence of diffusion; abrupt vortex breakup or gradual quasi-equilibrium evolution depend crucially on the strain to peak vorticity ratio and on the Reynolds number. Peculiar, unexpected effects are observed when hyperviscosity is used in place of Newtonian viscosity.

Original languageEnglish
Pages (from-to)3954-3962
Number of pages9
JournalPhysics of Fluids
Volume6
Issue number12
DOIs
Publication statusPublished - 1 Jan 1994

Fingerprint

Dive into the research topics of 'Vortex stripping and the erosion of coherent structures in two-dimensional flows'. Together they form a unique fingerprint.

Cite this