ISSN Online: 2377-424X
International Heat Transfer Conference 3
DESTRUCTION OF SUPERFLUIDITY CAUSED BY HEAT TRANSPORT FROM A HOT WALL THROUGH A WIDE TUBE TO A BATH OF LIQUID HELIUM II
Abstract
Heat transport through a vacuum-insulated short tube of large diameter (0.4 in.) to bulk liquid He II (1.75°K to the λ-point) has been studied when superfluidity is destroyed locally by film boiling. Heat was applied at constant power through a horizontal surface terminating the tube at its lower end. The heat transfer coefficients (0.014 to 0. 027 W/cm2°K) were a function of the length (about 0 to 10 in.) of the bulk liquid heat path. They increased upon lowering of the liquid temperature in approximate agreement with expectation based upon the apparent thermal conductivity of He II.