| Issue |
Europhys. Lett.
Volume 57, Number 4, February 2002
|
|
|---|---|---|
| Page(s) | 604 - 610 | |
| Section | Interdisciplinary physics and related areas of science and technology | |
| DOI | https://doi.org/10.1209/epl/i2002-00504-y | |
| Published online | 01 September 2002 | |
“Čerenkov” dewetting at soft interfaces
Institut Curie, UMR 168, Laboratoire Physico-Chimie
Curie 11 rue Pierre et Marie Curie, 75231 Paris cedex 05, France
Corresponding author: abuguin@curie.fr
Received:
28
June
2001
Accepted:
21
November
2001
A non-wetting liquid is pressed between a rubber cap and a solid
plate. When the plate slides at a velocity U larger than a
critical value 
, the contact is lubricated. However,
if the sliding surface carries a nucleating centre (a local
depression), a “dry wake” can be induced, with a well-defined
wake angle 
, as in Čerenkov radiation. We
interpret this by a competition between a dewetting velocity
and an invasion velocity U. The Mach relation 
is obeyed. These effects are relevant to
the hydroplaning of cars on wet roads.
PACS: 83.60.Uv – Wave propagation, fracture, and crack healing / 68.08.Bc – Wetting / 68.15.+e – Liquid thin films
© EDP Sciences, 2002
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