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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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Official URL: http://dx.doi.org/ 10.1103/PhysRevE.91.033013

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
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
Depositing User: Id for Latest eprints
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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