On The Phase-Lagged Model Of Superfluidity: High-Temperature Superfluidity Versus Superfluidity At Low Temperatures

摘要

It has been shown that the finite time lag between the onset of the velocity gradient and the corresponding shear stress that, in the phase-lag model of fluid flow is responsible for the wave transport of momentum, increases as temperature decreases. Thus, the phenomenon of superfluidity - an extremely short-living phenomenon at higher temperatures - may become a long-living phenomenon at lower temperatures. In addition, it follows from the phase-lag model of energy transport that the superfluid behavior should be accompanied by an apparent increase of the thermal conductivity of the fluid. It is suggested that no Bose-Einstein condensation may be needed for superfluidity to occur.