论文标题
超级漫步液滴的停止运动
Stop-and-go locomotion of superwalking droplets
论文作者
论文摘要
垂直以两个频率（$ f $和$ f/2 $）振动液体浴，具有相对相位差$ δϕ_0 $可以引起液体表面上的自propelled Superwalking液滴。我们已经在数字上研究了这样的超级行走液滴，两个驱动频率略有引起，从而导致相位差$ δϕ（t）$随时间线性变化。我们预测液滴的停止运动的出现与实验观察一致[Valani等。物理。莱特牧师。 {\ bf 123}，024503（2019）]。我们在参数空间中的模拟跨越了液滴大小和相位差的遍历速率，发现了三种不同类型的液滴运动：来回，前进和不规则的停止和行动运动。我们的发现为进一步研究动态驱动的液滴提供了基础，从而可以通过工程任意时间依赖时间函数来指导液滴的运动$ δϕ（t）$。
Vertically vibrating a liquid bath at two frequencies, $f$ and $f/2$, having a relative phase difference $Δϕ_0$ can give rise to self-propelled superwalking droplets on the liquid surface. We have numerically investigated such superwalking droplets with the two driving frequencies slightly detuned, resulting in the phase difference $Δϕ(t)$ varying linearly with time. We predict the emergence of stop-and-go motion of droplets, consistent with experimental observations [Valani et al. Phys. Rev. Lett. {\bf 123}, 024503 (2019)]. Our simulations in the parameter space spanned by the droplet size and the rate of traversal of the phase difference uncover three different types of droplet motion: back-and-forth, forth-and-forth, and irregular stop-and-go motion. Our findings lay a foundation for further studies of dynamically driven droplets, whereby the droplet's motion may be guided by engineering arbitrary time-dependent functions $Δϕ(t)$.
