Comparison of theory and direct numerical simulations of drag reduction by rodlike polymers in turbulent channel flows

被引：20

作者：

Benzi, Roberto ^{[1
,2
]}

Ching, Emily S. C. ^{[3
,4
]}

De Angelis, Elisabetta ^{[5
]}

Procaccia, Itamar ^{[6
]}

机构：

[1] Univ Roma Tor Vergata, Dipartimento Fis, I-00133 Rome, Italy

[2] Univ Roma Tor Vergata, Ist Nazl Fis Nucl, I-00133 Rome, Italy

[3] Chinese Univ Hong Kong, Dept Phys, Shatin, Hong Kong, Peoples R China

[4] Chinese Univ Hong Kong, Inst Theoret Phys, Shatin, Hong Kong, Peoples R China

[5] Univ Bologna, Fac Ingn 2, I-47100 Forli, Italy

[6] Weizmann Inst Sci, Dept Chem Phys, IL-76100 Rehovot, Israel

来源：

PHYSICAL REVIEW E | 2008年 / 77卷 / 04期

关键词：

D O I：

10.1103/PhysRevE.77.046309

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Numerical simulations of turbulent channel flows, with or without additives, are limited in the extent of the Reynolds number (Re) and Deborah number (De). The comparison of such simulations to theories of drag reduction, which are usually derived for asymptotically high Re and De, calls for some care. In this paper we present a study of drag reduction by rodlike polymers in a turbulent channel flow using direct numerical simulation and illustrate how these numerical results should be related to the recently developed theory.

引用

页数：5

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