Elasto-inertial turbulence

被引：193

作者：

Samanta, Devranjan ^{[1
,2
]}

Dubief, Yves ^{[3
]}

Holzner, Markus ^{[1
]}

Schaefer, Christof ^{[2
]}

Morozov, Alexander N. ^{[4
]}

Wagner, Christian ^{[2
]}

Hof, Bjoern ^{[1
,5
]}

机构：

[1] Max Planck Inst Dynam & Self Org, D-37073 Gottingen, Germany

[2] Univ Saarland, D-66041 Saarbrucken, Germany

[3] Univ Vermont, Sch Engn, Burlington, VT 05405 USA

[4] Univ Edinburgh, Scottish Univ Phys Alliance, Sch Phys & Astron, Edinburgh EH9 3JZ, Midlothian, Scotland

[5] IST Austria, A-3400 Klosterneuburg, Austria

来源：

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA | 2013年 / 110卷 / 26期

基金：

英国工程与自然科学研究理事会;

关键词：

elastic instabilities; polymer drag reduction; non-Newtonian fluids; transition to turbulence; DRAG-REDUCING POLYMERS; PIPE-FLOW; CHANNEL FLOW; SHEAR FLOWS; REDUCTION; ADDITIVES; TRANSITION; INSTABILITIES; STABILITY; ASYMPTOTE;

D O I：

10.1073/pnas.1219666110

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Turbulence is ubiquitous in nature, yet even for the case of ordinary Newtonian fluids like water, our understanding of this phenomenon is limited. Many liquids of practical importance are more complicated (e.g., blood, polymer melts, paints), however; they exhibit elastic as well as viscous characteristics, and the relation between stress and strain is nonlinear. We demonstrate here for a model system of such complex fluids that at high shear rates, turbulence is not simply modified as previously believed but is suppressed and replaced by a different type of disordered motion, elasto-inertial turbulence. Elasto-inertial turbulence is found to occur at much lower Reynolds numbers than Newtonian turbulence, and the dynamical properties differ significantly. The friction scaling observed coincides with the so-called "maximum drag reduction" asymptote, which is exhibited by a wide range of viscoelastic fluids.

引用

页码：10557 / 10562

页数：6

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