Experimental and theoretical evidence of universality in superfluid vortex reconnections.

ABSTRACT: The minimum separation between reconnecting vortices in fluids and superfluids obeys a universal scaling law with respect to time. The prereconnection and the postreconnection prefactors of this scaling law are different, a property related to irreversibility and to energy transfer and dissipation mechanisms. In the present work, we determine the temperature dependence of these prefactors in superfluid helium from experiments and a numeric model which fully accounts for the coupled dynamics of the superfluid vortex lines and the thermal normal fluid component. At all temperatures, we observe a pre- and postreconnection asymmetry similar to that observed in other superfluids and in classical viscous fluids, indicating that vortex reconnections display a universal behavior independent of the

SUBMITTER: Stasiak PZ 

PROVIDER: S-EPMC12130869 | biostudies-literature | 2025 May

REPOSITORIES: biostudies-literature