Numerical investigation of helicity in turbulent flow.

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Abstract

Results of direct numerical simulation of decaying, nearly isotropic turbulence are presented. The angular orientation between vorticity and velocity evolves from a state that is initially random to one in which there is a high probability of vector alignment. Helicity evolves in a qualitatively different manner that the energy or enstrophy, reflecting changes of flow topology. From a random, zero helicity field it is seen that viscosity can be a source of helicity generation. (from authors' abstract)

Original languageEnglish
Journal[No source information available]
StatePublished - 1986

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