Thermal convection and thermal conductivity of nondilute [sup 3]He-[sup 4]He mixtures

The authors present measurements of the critical temperature difference for the onset of thermal convection and the effective thermal conductivity in two [sup 3]He-superfluid-[sup 4]He mixtures. The mixtures were 6.8% and 9.8% by molar volume of[sup 3]He in [sup 4]He and the measurements were made f...

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Bibliographic Details
Published inJournal of low temperature physics Vol. 90:5-6
Main Authors Sullivan, T.S., Steinberg, V., Ecke, R.E.
Format Journal Article
LanguageEnglish
Published United States 01.03.1993
Subjects
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
CONVECTION
CRITICAL TEMPERATURE
DISPERSIONS
ELEMENTS
ENERGY TRANSFER
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
FLUID FLOW
FLUIDS
GASES
HEAT TRANSFER
HELIUM
HELIUM 3
HELIUM 4
HELIUM ISOTOPES
ISOTOPES
LIGHT NUCLEI
MASS TRANSFER
MIXTURES
NONMETALS
NUCLEI
PATTERN RECOGNITION
PHYSICAL PROPERTIES
RARE GASES
STABLE ISOTOPES
SUPERFLUIDITY
TEMPERATURE RANGE
TEMPERATURE RANGE 0000-0013 K
THERMAL CONDUCTIVITY
THERMODYNAMIC PROPERTIES 665420 > Superfluidity > (1992-)
TRANSITION TEMPERATURE
VOLUME
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Summary:The authors present measurements of the critical temperature difference for the onset of thermal convection and the effective thermal conductivity in two [sup 3]He-superfluid-[sup 4]He mixtures. The mixtures were 6.8% and 9.8% by molar volume of[sup 3]He in [sup 4]He and the measurements were made from 0.65 K to just above the superfluid transition temperature for each mixture. The measurements were made as part of an effort to visualize convective flow patterns in helium mixtures using optical shadowgraph techniques. The implications of the results for this effort are discussed.
Bibliography:None
ISSN:0022-2291
1573-7357
DOI:10.1007/BF00681886