Ching Emily S C, Lo T S, Procaccia Itamar
Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong.
Phys Rev E Stat Nonlin Soft Matter Phys. 2006 Aug;74(2 Pt 2):026301. doi: 10.1103/PhysRevE.74.026301. Epub 2006 Aug 16.
Drag reduction by polymers is bounded between two universal asymptotes, the von Kármán log law of the law and the maximum drag reduction (MDR) asymptote. It is theoretically understood why the MDR asymptote is universal, independent of whether the polymers are flexible or rodlike. The crossover behavior from the Newtonian von Kármán log law to the MDR is, however, not universal, showing different characteristics for flexible and rodlike polymers. In this paper we provide a theory for this crossover phenomenology.
聚合物减阻受限于两个通用渐近线之间，即冯·卡门对数定律和最大减阻（MDR）渐近线。从理论上理解了为什么MDR渐近线是通用的，与聚合物是柔性还是棒状无关。然而，从牛顿冯·卡门对数定律到MDR的交叉行为并非通用，柔性和棒状聚合物表现出不同的特征。在本文中，我们为这种交叉现象学提供了一种理论。
