The Role Of Solid Substrate On The Spreading Kinetics Of Liquid Droplet
Author(s)
A.M. Alteraifi & B.J. Sasa
Abstract
The role of solid substrate on the spreading
kinetics of liquid droplet
A.M. Alteraifi & B.J. Sasa
Department of Mechanical Engineering,
United Arab Emirates University, UAE
Abstract
Classic hydrodynamic wetting theory leads to a linear relationship between
spreading speed and the capillary force, being determined only by the surface
tension of the liquid and its viscosity. The theory appears in good agreement
with results generated from experiments conducted on the spreading of
Polydimethylsiloxanes, PDMS on soda-lime glass substrate and fails to account
for the behavior of other liquids. The spreading kinetics of three different liquids
(PDMS 1000cp, hexadecane and glycerin) was determined on three different
solids, namely, soda-lime glass, polymethylmethacrylate (PMMA) and
polystyrene (PS), which exhibit different critical wetting energies. The results
are summed up in two themes; equilibrial spreading and kinetics. PDMS is
found to exhibit complete spreading on all three different solids a
Keywords
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