title: Direct numerical simulations of statistically steady, homogeneous, isotropic fluid turbulence with polymer additives.
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.
authors.affiliation: Department of Mathematics and Computer Science, Eindhoven University of Technology, Eindhoven, The Netherlands. p.perlekar@tue.nl
authors.forename: Prasad
authors.initials: P
authors.lastname: Perlekar
authors.forename: Dhrubaditya
authors.initials: D
authors.lastname: Mitra
authors.forename: Rahul
authors.initials: R
authors.lastname: Pandit