TY - JOUR
T1 - Numerical investigation of helicity in turbulent flow
AU - Shtilman, Leonid
AU - Pelz, Richard B.
AU - Tsinober, Arkady
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 - 1988
Y1 - 1988
N2 - 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.
AB - 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.
UR - https://www.scopus.com/pages/publications/0023862503
U2 - 10.1016/0045-7930(88)90018-7
DO - 10.1016/0045-7930(88)90018-7
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AN - SCOPUS:0023862503
SN - 0045-7930
VL - 16
SP - 341
EP - 347
JO - Computers and Fluids
JF - Computers and Fluids
IS - 3
ER -