CONTACT LINE INSTABILITIES DURING DROP SP LASHING

Authors
VIGNESADLER M LEGAYDESESQUELLES F PRUNETFOCH B
Citation
M. Vignesadler et al., CONTACT LINE INSTABILITIES DURING DROP SP LASHING, Comptes rendus de l'Academie des sciences. Serie 2, Mecanique, physique, chimie, sciences de l'univers, sciences de la terre, 317(3), 1993, pp. 303-306
Citations number
5
Categorie Soggetti
Multidisciplinary Sciences
Journal title
Comptes rendus de l'Academie des sciences. Serie 2, Mecanique, physique, chimie, sciences de l'univers, sciences de la terre → ACNP
ISSN journal
07644450
Volume
317
Issue
3
Year of publication
1993
Pages
303 - 306
Database
ISI
SICI code
0764-4450(1993)317:3<303:CLIDDS>2.0.ZU;2-K
Abstract
The splash of a droplet on a rough steel plate (R(a) = 5,000 angstrom) is studied by fluorescence. Various instabilities of the contact line are observed depending on the liquid. With pure water, the relaxation of the contact line presents a festoon-shaped hysteresis similar to t he one obtained on a surface with random weak defects, while with an e mulsion a fingering instability is developed. The latter is attributed to the different wetting properties of the two phases of the emulsion . During the splash, the oil phase adsorbs further and it creates loca lized anchored strong defects. The time scale (1 ms) of the phenomena is remarkably small.