Two-dimensional, homogeneous, isotropic fluid turbulence with polymer additives
Fluid Dynamics
2016-11-16 v4
Abstract
We present the most extensive direct numerical simulations, attempted so far, of statistically steady, homogeneous, isotropic turbulence in two-dimensional fluid films with air-drag-induced friction and with polymer additives. Our study reveals that the polymers (a) reduce the total fluid energy, enstrophy, and palinstrophy, (b) modify the fluid energy spectrum both in inverse- and forward-cascade regimes, (c) reduce small-scale intermittency, (d) suppress regions of large vorticity and strain rate, and (e) stretch in strain-dominated regions. We compare our results with earlier experimental studies; and we propose new experiments.
Cite
@article{arxiv.1207.4774,
title = {Two-dimensional, homogeneous, isotropic fluid turbulence with polymer additives},
author = {Anupam Gupta and Prasad Perlekar and Rahul Pandit},
journal= {arXiv preprint arXiv:1207.4774},
year = {2016}
}
Comments
8 pages, 8 figures