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

24th IUPAP Conference on Computational Physics

物理学;计算机科学

Watanabe, Takeshi^1 ; Gotoh, Toshiyuki^1

Graduate School of Engineering, Department of Scientific and Engineering Simulations, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya 466-8555, Japan^1

关键词: Decaying turbulence;    Elastic turbulences;    Eulerian-lagrangian;    Experimental and numerical studies;    Kinetic energy spectra;    Low Reynolds number;    Parallel Computation;    Weissenberg number;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/454/1/012007/pdf
DOI  :  10.1088/1742-6596/454/1/012007

学科分类：计算机科学（综合）

来源: IOP

【 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) ∼ k-αin the range below the Kolmogorov length lKwhen the turbulence decayed. The exponent α satisfied 4 i. The value of α obtained by the largest Wirun was close to the values obtained in previous experimental and numerical studies on elastic turbulence, which is characterized by a larger Wiand 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.