Critical Velocity in Two-Fluid Flow of He II
- 22 October 1984
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 53 (17), 1669-1672
- https://doi.org/10.1103/physrevlett.53.1669
Abstract
We report the first measurements of the transition to superfluid turbulence in flows where the normal and superfluid velocities can be varied independently. The data reveal the existence of a critical line in the (, ) plane. A simple model of a temperature-independent critical line gives reasonable agreement with the critical velocities measured in pure superflow, in two-fluid flow, and in thermal counterflow. Our results support the theoretical view that the critical velocity is dominated by boundary dynamics.
Keywords
This publication has 12 references indexed in Scilit:
- Observation of a Remanent Vortex-Line Density in Superfluid HeliumPhysical Review Letters, 1984
- Transition from Dissipationless Superflow to Homogeneous Superfluid TurbulencePhysical Review Letters, 1983
- Critical Velocity for a Self-Sustaining Vortex Tangle in Superfluid HeliumPhysical Review Letters, 1983
- Generation of Superfluid Turbulence Deduced from Simple Dynamical RulesPhysical Review Letters, 1982
- Homogeneity of turbulence in pure superflowPhysical Review B, 1981
- Turbulence in Pure Superfluid FlowPhysical Review Letters, 1981
- Helium II thermal counterflow: Temperature- and pressure-difference data and analysis in terms of the Vinen theoryPhysical Review B, 1976
- Growth of Pinned Quantized Vortex Lines in Helium IIPhysical Review B, 1966
- Mutual friction in a heat current in liquid heliumn. II. IV. Critical heat currents in wide channelsProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1958
- Mutual friction in a heat current in liquid helium II III. Theory of the mutual frictionProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1957