Drop motion with surfactant transfer in a homogeneous surrounding
Drop motion with surfactant transfer in a homogeneous surrounding
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在均匀的环境中进行表面活性剂转移的液滴运动
DOI：
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发表时间：
1994
期刊：
影响因子：
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通讯作者：
M. Velarde
中科院分区：
文献类型：
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作者：
A. Rednikov;Yu. S. Ryazantsev;M. Velarde
当表面活性剂在液滴表面上进行一级等温化学反应时，考虑了在无限大的静止的均相表面活性剂溶液中，可溶性表面活性剂对液滴静止运动的影响.研究进行了小雷诺数和Peclet数的渐近情况下。首先，考虑线性近似。特别是，作用在液滴上的流体动力根据参数值提供推力或阻力。它也出现的运动可以是不稳定的和临界Marangoni数对应的不稳定阈值的不动状态的流体在浮力的情况下提供。强调的是不稳定的下降到其翻译。弱非线性分析过去的平移不稳定性表明多个定态的可能性。一方面，液动力对液滴速度的依赖性可以是非单调的。特别是，一个MA…
The influence of a soluble surfactant on the stationary motion of a drop in an infinite motionless homogeneous surfactant solution is considered when the surfactant undergoes a first‐order isothermal chemical reaction on the surface of the drop. The study is carried out for the asymptotic case of small Reynolds and Peclet numbers. First, the linear approximation is considered. It appears, in particular, that the hydrodynamical force acting on the drop provides either thrust or drag according to the parameter values. It also appears that the motion can be unstable and critical Marangoni numbers corresponding to instability thresholds of the motionless state of the fluids in the absence of buoyancy are provided. Emphasis is given to instability of the drop to its translations. A weakly nonlinear analysis past translational instability shows the possibility of multiple stationary states. On the one hand the hydrodynamical force dependence on the drop velocity can be nonmonotonous. Then, in particular, one ma...