热驱动马兰戈尼冲浪者
Thermally driven Marangoni surfers
摘要：
我们研究了界面粒子的自推进，这是由Marangoni应力所产生的自生非对称温度场或浓度场驱动的。我们分别计算由于界面处的应力不连续性而产生的长程Marangoni流v^{I}和由于颗粒表面上的无滑移条件而产生的短程速度场v^{P};这两种贡献都是针对具有温度梯度和偶极矩的球形浮子进行评估的。我们发现，自推进速度是由“源偶极子”的振幅，属于短程贡献v^{P}。另一方面，流体动力学相互作用由长程马兰哥尼流v^{I}决定;它的偶极部分导致相邻粒子的非对称平流模式，这反过来可能会扰乱已知的六角晶格，甚至有利于无序状态。
英文摘要：
We study auto-propulsion of a interface particle, which is driven by the Marangoni stress arising from a self-generated asymmetric temperature or concentration field. We calculate separately the long-range Marangoni flow v^{I} due to the stress discontinuity at the interface and the short-range velocity field v^{P} imposed by the no-slip condition on the particle surface; both contributions are evaluated for a spherical floater with temperature monopole and dipole moments. We find that the self-propulsion velocity is given by the amplitude of the "source doublet" which belongs to short-range contribution v^{P}. Hydrodynamic interactions, on the other hand, are determined by the long-range Marangoni flow v^{I}; its dipolar part results in an asymmetric advection pattern of neighbor particles, which in turn may perturb the known hexatic lattice or even favor disordered states.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
