Fluidization of granular media wetted by liquid He4

Schröter M, Herminghaus S, Huang K, Sohaili M (2009)


Publication Language: English

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2009

Journal

Publisher: American Physical Society

Book Volume: 79

Article Number: 010301

Journal Issue: 1

DOI: 10.1103/PhysRevE.79.010301

Abstract

We explore experimentally the fluidization of vertically agitated polymethylmethacrylate spheres wetted by liquid He4. By controlling the temperature around the λ point, we change the properties of the wetting liquid from a normal fluid (helium I) to a superfluid (helium II). For wetting by helium I, the critical acceleration for fluidization (Γc) shows a steep increase close to the saturation of the vapor pressure in the sample cell. For helium II wetting, Γc starts to increase at about 75% saturation, indicating that capillary bridges are enhanced by the superflow of the unsaturated helium film. Above saturation, Γc enters a plateau regime where the capillary force between particles is independent of the bridge volume. The plateau value is found to vary with temperature and shows a peak at 2.1 K, which we attribute to the influence of the specific heat of liquid helium. © 2009 The American Physical Society.

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How to cite

APA:

Schröter, M., Herminghaus, S., Huang, K., & Sohaili, M. (2009). Fluidization of granular media wetted by liquid He4. Physical Review E, 79(1). https://dx.doi.org/10.1103/PhysRevE.79.010301

MLA:

Schröter, Matthias, et al. "Fluidization of granular media wetted by liquid He4." Physical Review E 79.1 (2009).

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