Stability of Couette flow past a gel film
Stability of Couette flow past a gel film
复制标题
库埃特流过凝胶膜的稳定性
DOI:
10.1016/j.taml.2017.09.006
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发表时间:
2017
影响因子:
3.4
通讯作者:
Gao, Tong
中科院分区:
文献类型:
--
作者:
Hess, Andrew;Cai, Shengqiang;Gao, Tong
We study instability of a Newtonian Couette flow past a gel-like film in the limit of vanishing Reynolds number. Three models are explored including one hyperelastic (neo-Hookean) solid, and two viscoelastic (Kelvin–Voigt and Zener) solids. Instead of using the conventional Lagrangian description in the solid phase for solving the displacement field, we construct equivalent “differential” models in an Eulerian reference frame, and solve for the velocity, pressure, and stress in both fluid and solid phases simultaneously. We find the interfacial instability is driven by the first-normal stress difference in the base-state solution in both hyperelastic and viscoelastic models. For the neo-Hookean solid, when subjected to a shear flow, the interface exhibits a short-wave (finite-wavelength) instability when the film is thin (thick). In the Kelvin–Voigt and Zener solids where viscous effects are incorporated, instability growth is enhanced at small wavenumber but suppressed at large wavenumber, leading to a dominant finite-wavelength instability. In addition, adding surface tension effectively stabilizes the interface to sustain fluid shear.
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DOI:
10.1051/jp2:1994173
发表时间:
1994
期刊:
Journal De Physique Ii
影响因子:
--
作者:
V. Kumaran;G. Fredrickson;P. Pincus
通讯作者:
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DOI:
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发表时间:
2011-12-08
影响因子:
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DOI:
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发表时间:
2008-10
期刊:
Evidence Based Mental Health
影响因子:
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作者:
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通讯作者:
P. Cochat;L. Vaucoret;J. Sarles
影响因子:
3.1
作者:
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影响因子:
8.6
作者:
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