Numerical investigation of helicity in turbulent flow

Leonid Shtilman*, Richard B. Pelz, Arkady Tsinober

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Results of direct numerical simulations 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 higher probability of vector alignment. Total helicity evolves in a quantitatively different manner than the energy or ensotrophy, reflecting changes of flow topology. From a random, initially zero-helicity field it is seen that viscosity can be a source of spontaneous helicity generation and reflexional symmetry breaking.

Original languageEnglish
Pages (from-to)341-347
Number of pages7
JournalComputers and Fluids
Volume16
Issue number3
DOIs
StatePublished - 1988

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