Two-dimensional homogeneous isotropic fluid turbulence with polymer additives
Abstract
We carry out an extensive and high-resolution direct numerical simulation of 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 in both inverse- and forward-cascade régimes; (c) reduce small-scale intermittency; (d) suppress regions of high vorticity and strain rate; and (e) stretch in strain-dominated regions. We compare our results with earlier experimental studies and propose new experiments.
- Publication:
-
Physical Review E
- Pub Date:
- March 2015
- DOI:
- 10.1103/PhysRevE.91.033013
- arXiv:
- arXiv:1207.4774
- Bibcode:
- 2015PhRvE..91c3013G
- Keywords:
-
- 47.27.Gs;
- 47.27.Ak;
- Isotropic turbulence;
- homogeneous turbulence;
- Fundamentals;
- Physics - Fluid Dynamics
- E-Print:
- 8 pages, 8 figures