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  • Hydrodynamics of active polar systems in a (Visco)elastic background
    Pleiner, Harald ; Svenšek, Daniel ; Brand, Helmut R.
    We derive the full set of macroscopic equations necessary to describe the dynamics of systems with active polar order in a viscoelastic or elastic background. The active polar order is manifested by ... a second velocity, whose non-zero modulus is the polar order parameter and whose direction is the polar preferred direction. Viscoelasticity is described by a relaxing strain field allowing for a straightforward change from transient to permanent elasticity. Relative rotations of the elastic structure with respect to the polar direction are taken into account. The intricate coupling between active polar order and (transient) elasticity leads to a combined relaxation of the polar order parameter and the strains. The rather involved sound spectrum contains a specific excitation due to a reversible coupling between elasticity and polar order. Effects of chirality are also considered.
    Source: Rheologica acta : an international journal of rheology. - ISSN 0035-4511 (Vol. 55, iss. 10, 2016, str. 857-870)
    Type of material - article, component part ; adult, serious
    Publish date - 2016
    Language - english
    COBISS.SI-ID - 17738585

    Link(s):

    http://dx.doi.org/10.1007/s00397-016-0957-0
    DOI

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