Polymer Heat Transport Enhancement in Thermal Convection: The Case of Rayleigh-Taylor Turbulence

被引：37

作者：

Boffetta, G. ^{[1
,2
]}

Mazzino, A. ^{[3
,4
]}

Musacchio, S. ^{[5
]}

Vozella, L. ^{[3
,4
]}

机构：

[1] Univ Turin, Dipartimento Fis Gen, I-10125 Turin, Italy

[2] Univ Turin, Ist Nazl Fis Nucl, I-10125 Turin, Italy

[3] Univ Genoa, Dipartimento Fis, Ist Nazl Fis Nucl, I-16146 Genoa, Italy

[4] CNISM, I-16146 Genoa, Italy

[5] CNRS, Lab JA Dieudonne, UMR 6621, F-06108 Nice, France

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 18期

关键词：

DRAG REDUCTION; INSTABILITY; NUMBER; SIMULATIONS; ADDITIVES; FLUID;

D O I：

10.1103/PhysRevLett.104.184501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the effects of polymer additives on turbulence generated by the ubiquitous Rayleigh-Taylor instability. Numerical simulations of complete viscoelastic models provide clear evidence that the heat transport is enhanced up to 50% with respect to the Newtonian case. This phenomenon is accompanied by a speed-up of the mixing layer growth. We give a phenomenological interpretation of these results based on small-scale turbulent reduction induced by polymers.

引用

页数：4

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