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Peristaltic elastic instability in an inflated cylindrical channel

Abstract:

A long cylindrical cavity through a soft solid forms a soft microfluidic channel, or models a vascular capillary. We observe experimentally that, when such a channel bears a pressurized fluid, it first dilates homogeneously, but then becomes unstable to a peristaltic elastic instability. We combine theory and numerics to fully characterize the instability in a channel with initial radius a through an incompressible bulk neo-Hookean solid with shear modulus μ. We show instability occurs superc...

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Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1103/physrevlett.122.068003

Authors


More by this author
Institution:
University of Oxford
Division:
Medical Sciences Division
Department:
Physiology Anatomy and Genetics
Role:
Author
More by this author
Institution:
University of Oxford
Division:
MSD
Department:
Physiology Anatomy & Genetics
Oxford college:
Jesus College
Role:
Author
More from this funder
Funding agency for:
Srinivas, S
Grant:
108438/Z/15/Z
Publisher:
American Physical Society Publisher's website
Journal:
Physical Review Letters Journal website
Volume:
122
Issue:
6
Article number:
068003
Publication date:
2019-02-13
Acceptance date:
2019-01-11
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
Pmid:
30822054
Source identifiers:
976910
Language:
English
Keywords:
Pubs id:
pubs:976910
UUID:
uuid:368b2178-7cf1-4542-80c1-aa88d8c90221
Local pid:
pubs:976910
Deposit date:
2019-03-18

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