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Characteristic lengths at moving contact lines for a perfectly wetting fluid: the influence of speed on the dynamic contact angle

Published online by Cambridge University Press:  21 April 2004

JENS EGGERS  and
HOWARD A. STONE
JENS EGGERS
Affiliation:
Universität Gesamthochschule Essen, Fachbereich Physik, 45117 Essen, Germany Present address: School of Mathematics, University of Bristol, University Walk, Bristol BS8 1TW, UK.
HOWARD A. STONE
Affiliation:
Division of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA
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Abstract

It is common to relate the dynamic contact angle $\theta_d$ to the relative speed between the substrate and the contact line; theory suggests $\theta_d^3 \propto U$. In fact, available physical models show that the dynamic angle involves speed logarithmically and in a model-dependent manner. Experimental data consistent with this interpretation are cited.

Type
Papers
Information
Journal of Fluid Mechanics , Volume 505 , 25 April 2004 , pp. 309 - 321
Copyright
© 2004 Cambridge University Press

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