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Drag reduction by polymer additives in decaying turbulence

Kalelkar, Chirag and Govindarajan, Rama and Pandit, Rahul (2005) Drag reduction by polymer additives in decaying turbulence. In: Physical Review E, 72 (1).

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Abstract

We present results from a systematic numerical study of decaying turbulence in a dilute polymer solution by using a shell-model version of the finitely extensible nonlinear elastic and Peterlin equations.Our study leads to an appealing definition of the drag reduction for the case of decaying turbulence. We exhibit several new results, such as the potential-energy spectrum of the polymer, hitherto unobserved features in the temporal evolution of the kinetic-energy spectrum, and characterize intermittency in such systems. We compare our results with the Gledzer-Ohkitani-Yamada shell model for fluid turbulence.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to American Physical Society.
Keywords: grid-generated turbulence;magnetohydrodynamic turbulence;kinetic-theory;shell-model;macromolecules;rheology;cascade
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 30 Aug 2005
Last Modified: 19 Sep 2010 04:19
URI: http://eprints.iisc.ernet.in/id/eprint/3575

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