title: Two-dimensional homogeneous isotropic fluid turbulence with polymer additives.
abstract: We carry out an extensive and high-resolution direct numerical simulation of homogeneous, isotropic turbulence in two-dimensional fluid films with air-drag-induced friction and with polymer additives. Our study reveals that the polymers (a) reduce the total fluid energy, enstrophy, and palinstrophy; (b) modify the fluid energy spectrum in both inverse- and forward-cascade régimes; (c) reduce small-scale intermittency; (d) suppress regions of high vorticity and strain rate; and (e) stretch in strain-dominated regions. We compare our results with earlier experimental studies and propose new experiments.
authors: Centre for Condensed Matter Theory, Department of Physics, Indian Institute of Science, Bangalore 560012, India.|Department of Physics, University of Rome"Tor Vergata," Via della Ricerca Scientifica 1, 00133 Roma, Italy.
authors: Anupam
authors: A
authors: Gupta
authors: TIFR Centre for Interdisciplinary Sciences, 21 Brundavan Colony, Narsingi, Hyderabad 500075, India.
authors: Prasad
authors: P
authors: Perlekar
authors: Centre for Condensed Matter Theory, Department of Physics, Indian Institute of Science, Bangalore 560012, India.|Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore, India.
authors: Rahul
authors: R
authors: Pandit