Session M12: Vortex Dynamics and Vortex Flows IX

8:00 AM–9:57 AM, Tuesday, November 26, 2013
Room: 336

Chair: Kamran Mohseni, University of Florida

Abstract ID: BAPS.2013.DFD.M12.9

Abstract: M12.00009 : The life of a vortex knot (in experiment)

9:44 AM–9:57 AM

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  Dustin Kleckner
    (University of Chicago)

  Martin Scheeler
    (University of Chicago)

  Davide Proment
    (University of East Anglia)

  William T.M. Irvine
    (University of Chicago)

In recent experiments on linked and knotted vortices in classical fluids, we have found that they undergo a spontaneous change in topology: they untie themselves through a series of local reconnections. This outcome is at odds with the notion that fluid helicity (knottedness) should be conserved, as it should be for a dissipation-less fluid. Remarkably similar behavior is found for simulations of superfluid knots using the Gross-Pitaevskii equation. We will discuss our search for the missing helicity and the possibility of a universal driving mechanism for reconnections in topological vortices.

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