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Spontaneous chiral symmetry breaking in active fluids Dunkel, Joern
Description
Recent experiments show that bacterial and other active suspensions in confined geometries can self-organize into persistent flow structures that exhibit spontaneously broken mirror symmetry. To describe such observations within a minimal theoretical framework, we consider generalized Navier-Stokes (GNS) equations that combine a generic linear instability mechanism with a conventional advective nonlinearity. This phenomenological model is analytically tractable and reproduces several experimentally observed phenomena, including spontaneous flows and viscosity reduction in active suspensions. Triad analysis and numerical simulations of the GNS equations predict that 3D active flows can realize chiral Beltrami vector fields that support inverse energy transport from smaller to larger scales.
Item Metadata
Title |
Spontaneous chiral symmetry breaking in active fluids
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Creator | |
Publisher |
Banff International Research Station for Mathematical Innovation and Discovery
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Date Issued |
2018-07-25T10:30
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Description |
Recent experiments show that bacterial and other active suspensions in confined geometries can self-organize into persistent flow structures that exhibit spontaneously broken mirror symmetry. To describe such observations within a minimal theoretical framework, we consider generalized Navier-Stokes (GNS) equations that combine a generic linear instability mechanism with a conventional advective nonlinearity. This phenomenological model is analytically tractable and reproduces several experimentally observed phenomena, including spontaneous flows and viscosity reduction in active suspensions. Triad analysis and numerical simulations of the GNS equations predict that 3D active flows can realize chiral Beltrami vector fields that support inverse energy transport from smaller to larger scales.
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Extent |
34.0 minutes
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Subject | |
Type | |
File Format |
video/mp4
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Language |
eng
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Notes |
Author affiliation: Massachusetts Institute of Technology
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Series | |
Date Available |
2019-04-03
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Provider |
Vancouver : University of British Columbia Library
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Rights |
Attribution-NonCommercial-NoDerivatives 4.0 International
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DOI |
10.14288/1.0377768
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URI | |
Affiliation | |
Peer Review Status |
Unreviewed
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Scholarly Level |
Researcher
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Rights URI | |
Aggregated Source Repository |
DSpace
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Item Citations and Data
Rights
Attribution-NonCommercial-NoDerivatives 4.0 International