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 -