平面上的蜿蜒溪流：惯性与毛细作用的简单平衡？
Meandering rivulets on a plane: a simple balance between inertia and capillarity?
摘要：
水流流动的刚性基板上的实验已经进行了各种板倾角和流速，我们专注于制度的固定曲折。结果是：（i）流动是高度滞后的：曲折的形状仅在流量增加时随流量变化，而在流量减小时不会出现直的溪流状态。(ii)一个简单的力平衡，包括惯性，毛细管力，也滞后的润湿，以及占实验不稳定阈值流量和最终的曲率半径的曲折的曲率半径。
英文摘要：
Experiments on streams of water flowing down a rigid substrate have been performed for various plate inclinations and flow rates, and we focused on the regime of stationary meanders. The outcome is that (i) the flow is highly hysteretic : the shape of the meanders varies with flow rate only for increasing flow rates, and the straight rivulet regime does not appear for decreasing flow rate. (ii) A simple force balance, including inertia, capillary forces, and also hysteresis of wetting, accounts well for the experimental instability threshold flow rate and for the final radius of curvature of the meanders.
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