TY - BOOK
T1 - Dynamic multiscaling in two-dimensional fluid turbulence
AU - Ray, S.S.
AU - Mitra, D.
AU - Perlekar, P.
AU - Pandit, R.
PY - 2011
Y1 - 2011
N2 - We obtain, by extensive direct numerical simulations, time-dependent and equal-time structure functions for the vorticity, in both quasi-Lagrangian and Eulerian frames, for the direct-cascade regime in two-dimensional fluid turbulence with air-drag-induced friction. We show that different ways of extracting time scales from these time-dependent structure functions lead to different dynamic-multiscaling exponents, which are related to equal-time multiscaling exponents by different classes of bridge relations; for a representative value of the friction we verify that, given our error bars, these bridge relations hold.
AB - We obtain, by extensive direct numerical simulations, time-dependent and equal-time structure functions for the vorticity, in both quasi-Lagrangian and Eulerian frames, for the direct-cascade regime in two-dimensional fluid turbulence with air-drag-induced friction. We show that different ways of extracting time scales from these time-dependent structure functions lead to different dynamic-multiscaling exponents, which are related to equal-time multiscaling exponents by different classes of bridge relations; for a representative value of the friction we verify that, given our error bars, these bridge relations hold.
M3 - Report
T3 - arXiv.org [physics.flu-dyn]
BT - Dynamic multiscaling in two-dimensional fluid turbulence
PB - s.n.
ER -