Perlekar, Prasad ; Dhrubaditya, Mitra ; Pandit, Rahul (2006) Manifestations of drag reduction by polymer additives in decaying, homogeneous, isotropic turbulence Physical Review Letters, 97 (26). 264501_1-264501_4. ISSN 0031-9007
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Official URL: http://prl.aps.org/abstract/PRL/v97/i26/e264501
Related URL: http://dx.doi.org/10.1103/PhysRevLett.97.264501
Abstract
The existence of drag reduction by polymer additives, well established for wall-bounded turbulent flows, is controversial in homogeneous, isotropic turbulence. To settle this controversy, we carry out a high-resolution direct numerical simulation of decaying, homogeneous, isotropic turbulence with polymer additives. Our study reveals clear manifestations of drag-reduction-type 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, a suppression of small-scale intermittency, and a decrease in small-scale vorticity filaments.
Item Type: | Article |
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Source: | Copyright of this article belongs to The American Physical Society. |
ID Code: | 33503 |
Deposited On: | 30 Mar 2011 12:37 |
Last Modified: | 17 May 2016 16:21 |
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