Investigations on the saturated moving He II film with a length of up to 200 m

Abstract

Film flow in long and narrow capillaries has been studied by monitoring bulk-liquid levels. The observed oscillations, the damping and third-sound effects are discussed. Changes in film thickness, due to the superfluid velocity as well as due to acceleration, are observed and discussed together with the vapour-film equilibrium. Our earlier reported observations of the Kontorovich effect are confirmed using a longer capillary (200 m) and for different types of flow.