Liquid foam is a dense dispersion of liquid bubbles in a surfactant solution. Due to its large surface area, it is an out-of-equilibrium material that evolves with space and time {because of} coarsening, coalescence and liquid drainage. In many applications, it is required to control the lifetime of a foam by limiting the drainage or triggering the collapse at a specific location or a given time. We show here that applying an external electric field at the edge of the foam induces some liquid flows. Depending on the flow magnitude, it controls either gravity driven drainage, the foam stability, or the foam collapse at a specific location. The experimental results are quantitatively described by a simple model taking into account first the electroosmotic transport in such a deformable medium and, second the Marangoni flows induced by heterogeneous heating due to Joule effect. More specifically, we show for the first time that electroosmosis can be strongly enhanced due to thermal gradients generated by the applied electric field. [Usage] Secondary publications and information retrieval purposes. [Structure] You may use the environment to structure your abstract; use the optional argument of the command to give the category of each item.

中文翻译：

---

通过热增强电渗来控制泡沫的稳定性

液体泡沫是液体在表面活性剂溶液中的致密分散体。由于其大的表面积，它是一种不平衡的材料，会随着时间和空间的变化而变粗，因为会发生粗化，聚结和液体排出。在许多应用中，需要通过限制排水或在特定位置或给定时间触发塌陷来控制泡沫的寿命。我们在这里表明，在泡沫的边缘施加外部电场会引起一些液体流动。根据流量大小，它可以控制重力驱动的排水，泡沫稳定性或特定位置的泡沫塌陷。实验结果通过一个简单的模型进行了定量描述，首先考虑了在这种可变形介质中的电渗输运，其次，由于焦耳效应，异质加热引起的Marangoni流。更具体地说，我们首次展示了由于施加的电场产生的热梯度，电渗作用可以大大增强。[用途]二级出版物和信息检索目的。[结构]您可以使用环境来构建摘要；使用命令的可选参数给出每个项目的类别。