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Instability of vortex lines in the presence of axial normal fluid flow

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Abstract

We show that a normal mode analysis of the complete Hall two-fluid equations in rotating He II yields a critical velocity for axial normal fluid flow which is identical to the critical velocity derived in an earlier paper from the superfluid equation alone. We also present a simplified derivation of the critical velocity based on consideration of the forces acting on an isolated vortex line. The analysis is extended to3He-4He solutions and it is shown that rather small impurity concentrations can greatly increase the critical heat current in axial thermal counterflow.

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Supported in part by a grant from the National Science Foundation

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Ostermeier, R.M., Glaberson, W.I. Instability of vortex lines in the presence of axial normal fluid flow. J Low Temp Phys 21, 191–196 (1975). https://doi.org/10.1007/BF01141298

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  • DOI: https://doi.org/10.1007/BF01141298

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