We demonstrate theoretically and experimentally that injection of momentum in a region surrounding an object in microscale flow can yield both “cloaking” conditions, where the flow field outside the cloaking region is unaffected by the object, and “shielding” conditions, where the hydrodynamic forces on the object are eliminated. Using field-effect electro-osmosis as a mechanism for injection of momentum, we present a theoretical framework and analytical solutions for a range of geometrical shapes, validate these both numerically and experimentally, and demonstrate the ability to dynamically switch between the different states.

中文翻译：

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通过电渗透进行微尺度流体动力隐身和屏蔽

我们在理论上和实验上证明，在微尺度流中将物体注入周围区域的动量既可以产生“隐身”条件（其中隐身区域外部的流场不受物体影响），也可以产生“遮蔽”条件（其中流体动力会受到影响）物体上的物体被消除了。使用场效应电渗作为注入动量的机制，我们提供了一系列几何形状的理论框架和解析解，并在数值和实验上进行了验证，并展示了在不同状态之间动态切换的能力。