TY - JOUR
T1 - Numerical investigation of helicity in turbulent flow.
AU - Shtilman, L.
AU - Pelz, R. B.
AU - Tsinober, A.
N1 - Funding Information:
Acknowledgements--We would like to thank Professors E. Levich, B. Levich, A Frenkel, S. A. Orszag and V. Yakhot for helpful discussions. Professor Orszag was also of great assistance in providing the original computer code and computing facilities. This work was supported in part by a grant 85-00347/1 from U.S.-lsrael Binational Science Foundation, the Office of Naval Research under contract N00014-83-C-0451 and by the U.S. Department of Energy grant under contract NDE-AC02-80ER 10559. Computing was done at the National Center for Atmospheric Sciences and Lawrence Livermore Laboratory.
PY - 1986
Y1 - 1986
N2 - 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)
AB - 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)
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