Effect of interfacial viscosities on droplet migration at low surfactant concentrations
Effect of interfacial viscosities on droplet migration at low surfactant concentrations
复制标题
低表面活性剂浓度下界面粘度对液滴迁移的影响
DOI:
10.1017/jfm.2020.551
复制
发表时间:
2020
影响因子:
3.7
通讯作者:
Ardekani, Arezoo M.
中科院分区:
文献类型:
--
作者:
Dandekar, Rajat;Ardekani, Arezoo M.
In this paper, we theoretically investigate the migration of a surfactant covered droplet in a Poiseuille flow by including the surface viscosities of the droplet. We employ a regular perturbation expansion for low surface Péclet numbers and solve the problem up to a second-order approximation. We represent the drop surface as a two-dimensional homogeneous fluid using the Bousinessq–Scriven law and employ Lamb's general solution to represent the velocity fields inside and outside the droplet. We obtain an expression for the cross-stream migration velocity of the droplet, where the surface viscosities are captured by the Bousinessq numbers for surface shear and surface dilatation. We elucidate the influence of the surface viscosities on the migration characteristics of the droplet and the surfactant redistribution on the droplet surface. Our study sheds light on the importance of including the droplet surface viscosities to accurately predict the migration characteristics of the droplet.
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DOI:
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发表时间:
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期刊:
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--
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--
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影响因子:
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Lalita Gupta;D. Wasan
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DOI:
--
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