Two-dimensional, homogeneous, isotropic fluid turbulence with polymer additives

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, en...

Full description

Saved in:
Bibliographic Details
Published in:arXiv.org 2016-11
Main Authors: Gupta, Anupam, Prasad Perlekar, Pandit, Rahul
Format: Article
Language:English
Subjects:
Additives
Aerodynamics
Chemical industry
Computational fluid dynamics
Computer simulation
Energy spectra
Fluid films
Fluid flow
Isotropic turbulence
Polymers
Strain rate
Vorticity
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.1207.4774