IFIBA 22255
INSTITUTO DE FISICA DE BUENOS AIRES
Unidad Ejecutora - UE
artículos
Título:
Rotating helical turbulence. I. Global evolution and spectral behavior
Autor/es:
P.D. MININNI; A. POUQUET
Revista:
PHYSICS OF FLUIDS
Editorial:
AMER INST PHYSICS
Referencias:
Año: 2010 vol. 22 p. 351051 - 351059
ISSN:
1070-6631
Resumen:
We present results from two 15363 direct numerical
simulations of rotating turbulence where both energy and helicity are
injected into the flow by an external forcing. The dual cascade of
energy and helicity toward smaller scales observed in isotropic and
homogeneous turbulence is broken in the presence of rotation, with the
development of an inverse cascade of energy now coexisting with direct
cascades of energy and helicity. In the direct cascade range, the flux
of helicity dominates over that of energy at low Rossby number. These
cascades have several consequences for the statistics of the flow. The
evolution of global quantities and of the energy and helicity spectra is
studied, and comparisons with simulations at different Reynolds and
Rossby numbers at lower resolution are done to identify scaling laws.
