Angular acceleration of liquid helium II

Chan, S.L. (1970) Angular acceleration of liquid helium II. Physics of Fluids, 13 (8). pp. 1903-1912. ISSN 1070-6631, DOI

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Studies have been made of the processes of angular acceleration and retardation of a simply connected volume of helium II at 1.64°K using the technique of second sound attenuation. The acceleration and retardation are found to approach closely to reversibility as compared with experiments where the acceleration is more rapid. A critical velocity for bringing helium II into rotation has been found and the most reliable value for this is (0.047 ± 0.005) cm sec-1 for a cylindrical cavity of radius 2.60 cm. A relaxation time of about 103 sec is found for helium II to come into rotational equilibrium. Persistent currents of long lifetime have also been seen. The results are interpreted in terms of quantized vortices in liquid helium II.

Item Type: Article
Uncontrolled Keywords: Angular acceleration; liquid helium II
Subjects: Q Science > Q Science (General)
Q Science > QC Physics
Divisions: Faculty of Science > Department of Physics
Depositing User: Mr Jasny Razali
Date Deposited: 12 Mar 2021 01:24
Last Modified: 12 Mar 2021 01:24

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