Miguet Jonas, Scheid Benoit, Maquet Laurent, Darbois Texier Baptiste, Dorbolo Stéphane
TIPs, Université Libre de Bruxelles, CP 165/67, Brussels, Belgium.
GRASP, CESAM, Université de Liège, Liège, Belgium.
Phys Rev Lett. 2023 Nov 3;131(18):184001. doi: 10.1103/PhysRevLett.131.184001.
Antibubbles are ephemeral objects composed of a liquid drop encapsulated by a thin gas shell immersed in a liquid medium. When the drop is made of a volatile liquid and the medium is superheated, the gas shell inflates at a rate governed by the evaporation flux from the drop. This thermal process represents an alternate strategy for delaying the antibubble collapse. We model the dynamics of such "thermal" antibubbles by incorporating to the film drainage equation the heat-transfer-limited evaporation of the drop, which nourishes the gas shell with vapor, as for Leidenfrost drops. We demonstrate that the inflation of the gas shell is drastically inhibited by the thermalization of the initially colder drop. Because of this thermalization effect, smaller drops evaporate much faster than larger ones.
反气泡是一种短暂存在的物体，由一个液滴组成，该液滴被浸没在液体介质中的薄气壳所包裹。当液滴由挥发性液体构成且介质处于过热状态时，气壳会以由液滴蒸发通量所决定的速率膨胀。这一热过程代表了一种延迟反气泡坍塌的替代策略。我们通过将液滴的传热受限蒸发纳入薄膜排水方程来模拟此类“热”反气泡的动力学，就像莱顿弗罗斯特液滴一样，液滴蒸发产生的蒸汽为气壳提供物质。我们证明，最初较冷的液滴发生热弛豫会极大地抑制气壳的膨胀。由于这种热弛豫效应，较小的液滴比较大的液滴蒸发得快得多。
