Some flow properties of liquid helium II

The properties of pressure-induced flow of liquid helium II have been studied by the observation of the temperature and pressure dependence of the flow in narrow channels. The channels are in the form of an annular slit between two flat glass plates. Measurements of the flow rates have been made with hydrostatic pressures up to 2.3 x 103 dynes/cm 2, at temperatures between 1.39 and 2.10°K, and with slit widths of 2.4 and 4.3 microns. The observed flow rates have the same temperature dependence as the superfluid concentration in helium II. At lower pressure heads the flow rate is proportional to a power of the pressure head. The power is nearly independent of temperature but decreases with decreasing slit width. At higher pressures the flow rates reach saturation values at which they are independent of pressure. These saturation rates also have the temperature dependence of the superfluid concentration. The modifications necessary in the existing theories to explain these results are considered in a qualitative manner, and the need for further experiments of this nature is pointed out.

Name thesis:degree_name

Doctor of Philosophy

Level thesis:degree_level

Doctoral

Discipline thesis:degree_discipline

Natural Sciences

Grantor

Rice University

Year dc:date.issued

1953

Author dc:creator

• Swim, Richard Taylor

• Condensed matter physics

Statement dc:rights

• Copyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.

Language dc:language.iso

eng

Handle dc:identifier.uri

https://hdl.handle.net/1911/18463

OAI identifier oai:identifier

oai:repository.rice.edu:1911/18463