Surfactant spreading in a two-dimensional cavity and emergent contact-line singularities
Surfactant spreading in a two-dimensional cavity and emergent contact-line singularities
复制标题
表面活性剂在二维空腔中的扩散和出现的接触线奇点
DOI:
10.1017/jfm.2021.911
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发表时间:
2021
影响因子:
3.7
通讯作者:
Mcnair R
中科院分区:
文献类型:
--
作者:
Mcnair R
We model the advective Marangoni spreading of insoluble surfactant at the free surface of a viscous fluid that is confined within a two-dimensional rectangular cavity. Interfacial deflections are assumed small, with contact lines pinned to the walls of the cavity, and inertia is neglected. Linearising the surfactant transport equation about the equilibrium state allows a modal decomposition of the dynamics, with eigenvalues corresponding to decay rates of perturbations. Computation of the family of mutually orthogonal two-dimensional eigenfunctions reveals singular flow structures near each contact line, resulting in spatially oscillatory patterns of shear stress and a pressure field that diverges logarithmically. These singularities at a stationary contact line are associated with dynamic compression of the surfactant monolayer. We show how they can be regularised by weak surface diffusion. Their existence highlights the need for careful treatment in computations of unsteady advection-dominated surfactant transport in confined domains.
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影响因子:
3.7
作者:
O. Jensen;D. Halpern
通讯作者:
D. Halpern
影响因子:
3.7
作者:
O. Jensen
通讯作者:
O. Jensen
影响因子:
3.7
作者:
Dussaud, AD;Matar, OK;Troian, SM
通讯作者:
Troian, SM
影响因子:
7.2
作者:
Yingjie Liu;Christian Peco;J. Dolbow
通讯作者:
J. Dolbow
DOI:
10.1073/pnas.1702469114
发表时间:
2017-07-11
影响因子:
11.1
作者:
Peaudecerf, Francois J.;Landel, Julien R.;Luzzatto-Fegiz, Paolo
通讯作者:
Luzzatto-Fegiz, Paolo