Effect of Inhomogeneous Heat Flow on the Enhancement of Heat Capacity in Helium-II by Counterflow near Tλ
Abstract
In 2000 Harter et al. reported the first measurements of the enhancement of the heat capacity ΔCQ[equivalent]C(Q)-C(Q=0) of helium-II transporting a heat flux density Q near Tλ. Surprisingly, their measured ΔCQ was ~7–12 times larger than predicted, depending on which theory was assumed. In this report we present a candidate explanation for this discrepancy: unintended heat flux inhomogeneity. Because C(Q) should diverge at a critical heat flux density Qc, homogeneous heat flow is required for an accurate measurement. We present results from numerical analysis of the heat flow in the Harter et al. cell indicating that substantial inhomogeneity occurred. We determine the effect of the inhomogeneity on ΔCQ and find rough agreement with the observed disparity between prediction and measurement.
Additional Information
© 2006 American Institute of Physics. Issue Date: September 7, 2006. Work supported by NASA Fundamental Physics Discipline NAG3-1763 (STPB), NAG3-2900 (ARC, RAML, DLG), and JPL #960494 (RVD). RVD acknowledges support at Caltech as a Moore Distinguished Scholar.Attached Files
Published - BOYaipcp06.pdf
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Additional details
- Eprint ID
- 9925
- Resolver ID
- CaltechAUTHORS:BOYaipcp06
- NASA
- NAG3-1763
- NASA
- NAG3-2900
- NASA/JPL
- 960494
- Gordon and Betty Moore Foundation
- Created
-
2008-03-27Created from EPrint's datestamp field
- Updated
-
2021-11-08Created from EPrint's last_modified field
- Series Name
- AIP Conference Proceedings
- Series Volume or Issue Number
- 850