Kalelkar Chirag, Govindarajan Rama, Pandit Rahul
Centre for Condensed Matter Theory, Department of Physics, Indian Institute of Science, Bangalore 560012, India.
Phys Rev E Stat Nonlin Soft Matter Phys. 2005 Jul;72(1 Pt 2):017301. doi: 10.1103/PhysRevE.72.017301. Epub 2005 Jul 21.
We present results from a systematic numerical study of decaying turbulence in a dilute polymer solution by using a shell-model version of the finitely extensible nonlinear elastic and Peterlin equations. Our study leads to an appealing definition of the drag reduction for the case of decaying turbulence. We exhibit several new results, such as the potential-energy spectrum of the polymer, hitherto unobserved features in the temporal evolution of the kinetic-energy spectrum, and characterize intermittency in such systems. We compare our results with the Gledzer-Ohkitani-Yamada shell model for fluid turbulence.
我们通过使用有限可扩展非线性弹性方程和彼得林方程的壳模型版本，对稀聚合物溶液中衰减湍流进行了系统的数值研究，并展示了研究结果。我们的研究为衰减湍流情况下的减阻提出了一个有吸引力的定义。我们展示了几个新的结果，例如聚合物的势能谱、动能谱时间演化中迄今未观察到的特征，并对这类系统中的间歇性进行了表征。我们将我们的结果与用于流体湍流的格莱德泽-大北谷-山田壳模型进行了比较。
