8 citations · 22 across the 4 of their papers we have counts for
4 papers
Helicity within the vortex filament model
R. Hänninen, N. Hietala, H. Salman
Kinetic helicity is one of the invariants of the Euler equations that is associated with the topology of vortex lines within the fluid. In superfluids, the vorticity is concentrate…
Leapfrogging Kelvin waves
N. Hietala, R. Hänninen, H. Salman +1
Two vortex rings can form a localized configuration whereby they continually pass through one another in an alternating fashion. This phenomenon is called leapfrogging. Using param…
Comment on "Motion of a helical vortex filament in superfluid 4He under the extrinsic form of the local induction approximation"
Niklas Hietala, Risto Hänninen
We comment on the paper by Van Gorder ["Motion of a helical vortex filament in superfluid He under the extrinsic form of the local induction approximation", Phys. Fluids 25,…
Identification of Kelvin waves: numerical challenges
R. Hänninen, N. Hietala
Kelvin waves are expected to play an essential role in the energy dissipation for quantized vortices. However, the identification of these helical distortions is not straightforwar…