Reynolds number dependence of drag reduction by rod-like polymers
Chaotic Dynamics
2007-05-23 v1 Fluid Dynamics
Abstract
We present experimental and theoretical results addressing the Reynolds number (Re) dependence of drag reduction by sufficiently large concentrations of rod-like polymers in turbulent wall-bounded flows. It is shown that when Re is small the drag is {\em enhanced}. On the other hand when Re increases the drag is reduced and eventually the Maximal Drag Reduction (MDR) asymptote is attained. The theory is shown to be in excellent agreement with experiments, rationalizing and explaining all the universal and the non-universal aspects of drag reduction by rod-like polymers.
Keywords
Cite
@article{arxiv.nlin/0607006,
title = {Reynolds number dependence of drag reduction by rod-like polymers},
author = {Yacine Amarouchene and Daniel Bonn and Hamid Kellay and Ting-Shek Lo and Victor S. L'vov and Itamar Procaccia},
journal= {arXiv preprint arXiv:nlin/0607006},
year = {2007}
}
Comments
7 pages, 7 figures, submitted to Phy. Fluids