Kelvin-Helmholtz instability of AB interface in superfluid 3He

Abstract

The Kelvin-Helmholtz instability is well-known in classical hydrodynamics, where it explains the sudden emergence of interfacial surface waves as a function of the velocity of flow parallel to the interface. It can be carried over to the inviscid two-fluid dynamics of superfluids, to study different types of interfaces and phase boundaries in quantum fluids. We report measurements on the stability of the phase boundary separating the two bulk phases of superfluid 3He in rotating flow, while the boundary is localized with the gradient of the magnetic field to a position perpendicular to the rotation axis. The results demonstrate that the classic stability condition, when modified for the superfluid environment, is obeyed down to 0.4 Tc, if a large fraction of the magnetic polarization of the B-phase is attributed to a parabolic reduction of the interfacial surface tension with increasing magnetic field.

14 pages, 14 figures

References in corpus (8)

• Pinning down the superfluid and measuring masses using pulsar glitches
• Quantum turbulence in propagating superfluid vortex front
• Twisted vortex state
• Strong Coupling Corrections to the Ginzburg-Landau Theory of Superfluid ^{3}He
• Exact solutions for nonlinear development of Kelvin-Helmholtz instability for counterflow of superfluid and normal components of Helium II
• Energy and angular momentum balance in wall-bounded superfluid turbulence
• Mutual friction in superfluid ${}^3$He-B in the low-temperature regime
• Orbitropic Effect in Superfluid ${}^3$He B-phase boundaries

Cited by in corpus (4)

• Pattern formation of quantum Kelvin-Helmholtz instability in binary superfluids
• Interface Dynamics of Strongly interacting Binary Superfluids
• Counterflow and coflow instabilities in miscible binary superfluids
• ${\varphi }^4$ Theory Hamiltonian for Fluids: Application to the surface tension near the critical point