We experimentally study the soap film flow past a rigid plate with a trailing closed filament of a small bending modulus acting as a flexible afterbody. The complex fluid-structure interactions due to the deformable afterbody shape and corresponding dynamics are studied. We find that the shape of the afterbody is determined by filament length, filament bending modulus, and flow speed. A significant drag reduction of approximately 10.0% is achieved under specific conditions. We analyze the drag mechanism by characterizing the deformable afterbody shape. Our experiment and modeling suggest that such a flow control strategy and sizable drag reduction are expected to occur over a specific flow speed regime when a suitable flexible coating is added.

中文翻译：

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流动性皂膜中刚性-柔韧性耦合系统的形状变形和阻力变化。

我们通过实验研究肥皂膜流过刚性板的过程，该刚性板具有小的弯曲模量的尾随闭合细丝，充当柔韧性的后身。研究了由于可变形的后身形状和相应的动力学引起的复杂的流固耦合。我们发现，后身的形状由灯丝长度，灯丝弯曲模量和流速决定。在特定条件下，可实现约10.0％的显着减阻。我们通过表征可变形的后身形状来分析阻力机制。我们的实验和建模表明，当添加合适的柔性涂料时，预计在特定的流速范围内会发生这种流量控制策略和相当大的减阻。