| Issue |
Europhys. Lett.
Volume 58, Number 6, June 2002
|
|
|---|---|---|
| Page(s) | 837 - 843 | |
| Section | Condensed matter: structure, mechanical and thermal properties | |
| DOI | https://doi.org/10.1209/epl/i2002-00450-8 | |
| Published online | 01 June 2002 | |
Apparent dewetting due to superfluid flow
Laboratoire de Physique Statistique de l'École
Normale Supérieure
associé au CNRS et aux Universités Paris 6 et Paris 7
24 rue Lhomond, 75231 Paris Cedex 05, France
Received:
7
January
2002
Accepted:
27
March
2002
We have investigated the wetting behaviour of superfluid helium-4
on silicon. Surprisingly, we observe pseudo-dewetting: though a
thick superfluid film covers the substrate, the meniscus diplays a
finite contact angle which decreases from about 
at low
temperature down to zero at the superfluid transition. We show
that this behaviour can be explained by a pressure decrease due to
a superfluid flow, closely related to the Kontorovich effect.
PACS: 68.08.Bc – Wetting / 68.15.+e – Liquid thin films / 83.10.Bb – Kinematics of deformation and flow
© EDP Sciences, 2002
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