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Multiscale modelling in the numerical computation of isothermal non-wetting

Published online by Cambridge University Press:  24 April 2006

MARC K. SMITH  and
G. PAUL NEITZEL
MARC K. SMITH
Affiliation:
The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0405, USA
G. PAUL NEITZEL
Affiliation:
The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0405, USA
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Abstract

A state of permanent, isothermal non-wetting of a solid surface by a normally wetting liquid may be achieved if the surface moves tangentially to a liquid drop that is pressed against it. Surrounding gas is swept into the space between the liquid and solid creating a lubricating film that prevents wetting. The length scales of the drop and the film are typically three or more orders of magnitude different, making numerical simulation difficult from a resolution standpoint. The present paper focuses on a hybrid approach employing lubrication theory for the thinnest portions of the gas film and numerical simulation for the liquid and outer gas phases.

Type
Papers
Information
Journal of Fluid Mechanics , Volume 554 , 10 May 2006 , pp. 67 - 83
Copyright
© 2006 Cambridge University Press

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