Kinetic energy spectrum of low-Reynolds-number turbulence with polymer additives

被引：7
|
作者：
Watanabe, Takeshi [1 ]
Gotoh, Toshiyuki [1 ]
机构：
[1] Nagoya Inst Technol, Grad Sch Engn, Dept Sci & Engn Simulat, Showa Ku, Nagoya, Aichi 4668555, Japan
来源：
24TH IUPAP CONFERENCE ON COMPUTATIONAL PHYSICS (IUPAP-CCP 2012) | 2013年 / 454卷
关键词：
SIMULATIONS;
D O I：
10.1088/1742-6596/454/1/012007
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The effects of polymer additives on the behavior of the kinetic energy spectrum in isotropic decaying turbulence were numerically investigated by hybrid Eulerian-Lagrangian simulations making full use of large-scale parallel computation. The kinetic energy spectrum was found to obey the power-law E(k) similar to k(-alpha) in the range below the Kolmogorov length l(K) when the turbulence decayed. The exponent a satisfied 4 < alpha < 5 and decreased with the increase in the Weissenberg number W-i. The value of a obtained by the largest W-i run was close to the values obtained in previous experimental and numerical studies on elastic turbulence, which is characterized by a larger W-i and a Reynolds number of less than unity. The relationship between the results of the present study and the results obtained for elastic turbulence is also discussed.
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页数：8
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