IFIBA 22255
INSTITUTO DE FISICA DE BUENOS AIRES
Unidad Ejecutora - UE
artículos
Título:
Passive scalar cascades in rotating helical and non-helical flows
Autor/es:
P. RODRIGUEZ IMAZIO; P. D. MININNI
Revista:
PHYSICA SCRIPTA - (Print)
Editorial:
IOP PUBLISHING LTD
Referencias:
Lugar: Londres; Año: 2013 vol. T155 p. 140371 - 140378
ISSN:
0031-8949
Resumen:
We study how helicity affects the spectrum of a passive scalar in
rotating turbulent flows, using numerical simulations of turbulent flows
with or without rotation and with or without injection of helicity.
Scaling laws for energy and passive scalar spectra in the direction
perpendicular to the rotation axis differ in rotating helical flows from
those found in the non-helical case, with the spectrum of passive
scalar variance in the former case being shallower than in the latter. A
simple phenomenological model that links the effects of helicity on the
energy spectrum with the passive scalar spectrum is presented.
