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Issue 3, 2017
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Microscale flow dynamics of ribbons and sheets

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Numerical study of the hydrodynamics of thin sheets and ribbons presents difficulties associated with resolving multiple length scales. To circumvent these difficulties, asymptotic methods have been developed to describe the dynamics of slender fibres and ribbons. However, such theories entail restrictions on the shapes that can be studied, and often break down in regions where standard boundary element methods are still impractical. In this paper we develop a regularised stokeslet method for ribbons and sheets in order to bridge the gap between asymptotic and boundary element methods. The method is validated against the analytical solution for plate ellipsoids, as well as the dynamics of ribbon helices and an experimental microswimmer. We then demonstrate the versatility of this method by calculating the flow around a double helix, and the swimming dynamics of a microscale “magic carpet”.

Graphical abstract: Microscale flow dynamics of ribbons and sheets

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Article information

15 Sep 2016
18 Nov 2016
First published
22 Nov 2016

Soft Matter, 2017,13, 546-553
Article type

Microscale flow dynamics of ribbons and sheets

T. D. Montenegro-Johnson, L. Koens and E. Lauga, Soft Matter, 2017, 13, 546
DOI: 10.1039/C6SM02105K

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