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Direct numerical simulations of statistically steady, homogeneous, isotropic fluid turbulence with polymer additives

Perlekar, Prasad and Mitra, Dhrubaditya and Pandit, Rahul (2010) Direct numerical simulations of statistically steady, homogeneous, isotropic fluid turbulence with polymer additives. In: Physical Review E - Statistical, Nonlinear and Soft Matter Physics, 82 (6, Par).

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Official URL: http://pre.aps.org/abstract/PRE/v82/i6/e066313

Abstract

We carry out a direct numerical simulation (DNS) study that reveals the effects of polymers on statistically steady, forced, homogeneous, and isotropic fluid turbulence. We find clear manifestations of dissipation-reduction phenomena: on the addition of polymers to the turbulent fluid, we obtain a reduction in the energy dissipation rate; a significant modification of the fluid-energy spectrum, especially in the deep-dissipation range; and signatures of the suppression of small-scale structures, including a decrease in small-scale vorticity filaments. We also compare our results with recent experiments and earlier DNS studies of decaying fluid turbulence with polymer additives.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to The American Physical Society.
Department/Centre: Others
Date Deposited: 03 Mar 2011 12:30
Last Modified: 03 Mar 2011 12:30
URI: http://eprints.iisc.ernet.in/id/eprint/35791

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