Title:

  A high-resolution direct numerical siumlation of fluid turbulence
  with polymer additives

Authors:

  Prasad Perlekar and Rahul Pandit

  Centre for Condensed Matter Theory
  Department of Physics
  Indian Institute of Science
  Bangalore 560 012

  and

  Dhrubaditya Mitra
  Observatoire de la Cote D'azur
  BP 4229
  06304 Nice Cedex 4
  France

  Abstract:

We carry out the highest-resolution direct numerical simulation (DNS)
study to date of fluid  turbulence with polymer additives. This requires
the solution of the Navier-Stokes equation for the fluid coupled to the
FENE-P model for the polymers; we solve the former by a pseudospectral
method and the latter by a high-order finite-difference scheme. We have
developed a parallel code for this problem on the IBM cluster in the
SERC of the Indian Institute of Science.
Our study has led to a detailed elucidation of drag-reduction-type
phenomena, because of the polymer additives, in decaying, homogeneous,
isotropic fluid turbulence.