Stationary convection in dilute solutions of /sup 3/He in superfluid /sup 4/He

Journal Article · Mon Dec 01 04:00:00 EST 1980 · Proc. Natl. Acad. Sci. U.S.A.; (United States)

DOI:https://doi.org/10.1073/pnas.77.12.6983· OSTI ID:6333362

Warkentin, P A ^[1]; Haucke, H J; Lucas, P; Wheatley, J C

---

1. Univ. of California, San Diego, La Jolla

Two symmetric, convecting steady states have been observed in a novel cell of unity aspect ratio and studied over a range of temperature for two concentrations of /sup 3/He in superfluid /sup 4/He. An existing theory due to Parshin has been related to the conditions necessary for convection in this system, defining a Rayleigh number closely analogous to that of a classical one-component Benard system. Values of this Rayleigh number at the onset of convection calculated from experimental data are found to have little temperature dependence, with an average value near that for a classical one-component fluid in this geometry. The Prandtl number is small and temperature dependent, with a smallest calculated value of 0.05.

• OSTI ID: 6333362
• Journal Information: Proc. Natl. Acad. Sci. U.S.A.; (United States), Journal Name: Proc. Natl. Acad. Sci. U.S.A.; (United States) Vol. 77:12; ISSN PNASA
• Country of Publication: United States
• Language: English

Related Subjects

640450* -- Fluid Physics-- Superfluidity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CONVECTION
CRITICAL TEMPERATURE
DATA
DISPERSIONS
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
EXPERIMENTAL DATA
FLUIDS
HELIUM 3
HELIUM 4
HELIUM II
HELIUM ISOTOPES
INFORMATION
ISOTOPES
LIGHT NUCLEI
MIXTURES
NUCLEI
NUMERICAL DATA
NUSSELT NUMBER
PHYSICAL PROPERTIES
PRANDTL NUMBER
QUANTUM FLUIDS
SOLUTIONS
STABLE ISOTOPES
SUPERFLUIDITY
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
ULTRALOW TEMPERATURE