EFFECTIVE DIFFUSIVITY ASSOCIATED WITH AXIAL TRANSPORT IN INSULATED OPEN-ENDED GORTER-MELLINK DUCTS
作者:
Y.I. KIM,
T.H.K. FREDERKING,
期刊:
Chemical Engineering Communications
(Taylor Available online 1983)
卷期:
Volume 22,
issue 1-2
页码: 21-27
ISSN:0098-6445
年代: 1983
DOI:10.1080/00986448308940042
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Steady, single-phase transport characterized by high eddy diffusivity in axial direction is a special case of vessel transport phenomena which has not been studied systematically so far. In the present paper, experiments are reported for a Gorter-Mellink duct, at zero net mass flow, covering turbulent eddy transport in cold He4pressurized beyond its thermodynamic critical pressure above 4 K. Axial transport in vertical direction is induced by gravitational buoyancy. A new phenomenological equation is proposed on the basis of quantum fluid convection postulated originally for He II below the lambda point (Goner and Mellink, 1949). Our data agree reasonably with the equation.
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