在用沐浴露之类的黏稠液体时,你有没有注意到一个奇怪的现象,当你把沐浴露挤在手中时,原本垂直下落的“液体柱”会出现“旋转堆积”的现象,这是为什么呢?其实这是一种低雷诺数流动的典型现象,雷诺数即流体惯性力与黏性力之比,雷诺数越小,流体中黏性力的作用也就越大。在倒洗发水等高黏性的流体时,由于黏性力的作用,每部分流体微团都会受到相邻流体微团的“拉扯” Have you noticed a strange phenomenon when using a viscous liquid such as a shower gel? When you squeeze the shower gel in your hand, the “vertical column” of liquid will appear “swirling” Phenomenon, which is why? In fact, this is a typical phenomenon of low Reynolds number flow, the Reynolds number that fluid inertia and viscous force ratio, the smaller the Reynolds number, the greater the role of viscous fluid in the fluid. In the backwash of hair and other highly viscous fluids, due to the viscous forces, each part of the fluid micelles is affected by the “pull” of the adjacent fluid micelles