J F Joanny et al 2007 New J. Phys. 9 422 doi:10.1088/1367-2630/9/11/422
Hydrodynamic theory for multi-component active polar gels
Focus on Physics of the CytoskeletonJ F Joanny1, F Jülicher2, K Kruse2,3 and J Prost1,4
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We develop a generic hydrodynamic theory of active fluids with several components. We take into account polar order and consider the case when one component is viscoelastic. Our theory is motivated by the cytoskeleton which is a network of elastic filaments that are coupled to active processes such as the action of motor proteins which can generate relative forces between filaments as they hydrolyze a fuel (ATP). In addition to the filament gel, the system is embedded in a solvent component and free monomers constitute a third component. We derive constitutive material equations for the combined system which include reactive and dissipative couplings as well as the chemical driving by ATP hydrolysis and a possible chiral symmetry of the filaments. As an illustration of these equations, we discuss an active liquid in a simple shear gradient.
- An acknowledgment was added to this article on 6 February 2008.
- PACS
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87.16.Ka Filaments, microtubules, their networks, and supramolecular assemblies
87.16.Nn Motor proteins (myosin, kinesin dynein)
87.16.Yc Regulatory genetic and chemical networks
87.16.A- Theory, modeling, and simulations
- Subjects
- Dates
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Issue 11 (November 2007)
Received 4 June 2007
Published 30 November 2007
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Hydrodynamic theory for multi-component active polar gels
J F Joanny et al 2007 New J. Phys. 9 422
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