论文标题
液态浴上的主动挥发性滴剂
Active volatile drops on liquid baths
论文作者
论文摘要
在大多数实验研究中，由于溶质起源的自我产生的界面应力，活跃的液体大量下降。在这里，我们证明了由于热起源的压力，液态浴表面上挥发性下降的自我推测。蒸发热泵将转化为由热毛发应力驱动的定向运动，由于落水温度场的对称性断裂，该毛细度应力在滴度表面出现。降速对活动源的依赖性，即蒸发通量，以缩放参数得出并捕获实验数据。
In most experimental studies, active drops propel in a liquid bulk due to self-generated interfacial stresses of solutal origin. Here, we demonstrate the self-propulsion of a volatile drop on the surface of a liquid bath due to stresses of thermal origin. Evaporative heat pumping is converted into directed motion driven by thermocapillary stresses, which emerge on the drop surface as a result of a symmetry breaking of the drop temperature field. The dependence of the drop speed on the activity source, i.e. the evaporation flux, is derived with scaling arguments and captures the experimental data.
