Perlekar, Prasad and Mitra, Dhrubaditya and Pandit, Rahul (2006) Manifestations of Drag Reduction by Polymer Additives in Decaying, Homogeneous, Isotropic Turbulence. In: Physical Review Letters, 97 (26). 264501-1-264501-4.
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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:||Journal Article|
|Additional Information:||Copy right of this article belongs to the American Physical Society|
|Department/Centre:||Division of Physical & Mathematical Sciences > Physics|
|Date Deposited:||12 Mar 2007|
|Last Modified:||19 Sep 2010 04:34|
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