Working model of the London moment readout system
Abstract
The operating characteristics of a porous plug which has liquid helium on one side and which is pumped on under vacuum on the other side are discussed. The system investigated consists of a container of liquid helium which is well isolated, and the only means for mass flow out of the container is through a plug mode of porous material. The plug was assumed to have liquid helium on the container side while the other side of the plug is evacuated. Three cases were considered: (1) perfect evacuation with zero pressure, (2) evacuation through a chocked orifice, and (3) evacuation through a long, small diameter pipe with heating. Mass flow rates were determined along with mass flow at temperature above the lambda point temperature. Solutions were obtained for normal and superfluid velocity.
- Publication:
-
Alabama Univ., Huntsville Report
- Pub Date:
- March 1975
- Bibcode:
- 1975alab.reptR....H
- Keywords:
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- Information Systems;
- Liquid Helium;
- Plugs;
- Superfluidity;
- Two Fluid Models;
- Flow Velocity;
- Mass Flow Rate;
- Thermal Conductivity;
- Velocity Distribution;
- Fluid Mechanics and Heat Transfer