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Spontaneous flow transition in active polar gels
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We study theoretically the effects of confinement on active polar gels such as the actin network of eukaryotic cells. Using generalized hydrodynamics equations derived for active gels, we predict, in the case of quasi one-dimensional geometry, a spontaneous flow transition from a homogeneously polarized immobile state for small thicknesses, to a perturbed flowing state for larger thicknesses. The transition is not driven by an external field but by the activity of the system. We suggest several possible experimental realizations.
Forward citations
Cited by 2 Pith papers
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Defect states in compressible active polar fluids with turnover
Turnover generates outward flows from defect cores that overcome elastic attraction, stabilizing topological defects in compressible active polar fluids and producing lattices, foams, and vortex glasses.
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Non-linear visco-elasto-plastic rheology of a viscous vertex model
A mean-field constitutive model linking cell shape and shear rate to stress and T1-rearrangement yielding is constructed for a viscous (internally dissipative) vertex model and validated against large-amplitude oscill...
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