Two-dimensional homogeneous isotropic fluid turbulence with polymer additives

Gupta, Anupam and Perlekar, Prasad and Pandit, Rahul (2015) Two-dimensional homogeneous isotropic fluid turbulence with polymer additives. In: PHYSICAL REVIEW E, 91 (3).

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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 regimes; (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.

Item Type:	Journal Article
Publication:	PHYSICAL REVIEW E
Publisher:	AMER PHYSICAL SOC
Additional Information:	Copy right for this article belongs to the AMER PHYSICAL SOC, ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	15 Jun 2015 07:28
Last Modified:	15 Jun 2015 07:28
URI:	http://eprints.iisc.ac.in/id/eprint/51658

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