Spreading of non-Newtonian liquids over solid substrates

V M Starov; A N Tyatyushkin; M G Velarde; S A Zhdanov

doi:10.1016/s0021-9797(02)00034-6

Spreading of non-Newtonian liquids over solid substrates

J Colloid Interface Sci. 2003 Jan 15;257(2):284-90. doi: 10.1016/s0021-9797(02)00034-6.

Authors

V M Starov¹, A N Tyatyushkin, M G Velarde, S A Zhdanov

Affiliation

¹ Department of Chemical Engineering, Loughborough University, Loughborough, Leicestershire, LE11 3TU, UK. V.M.Starov@lboro.ac.uk

PMID: 16256482
DOI: 10.1016/s0021-9797(02)00034-6

Abstract

The spreading of drops of a non-Newtonian liquid (Ostwald-de Waele liquid) over horizontal solid substrates is theoretically investigated in the case of complete wetting and small dynamic contact angles. Both gravitational and capillary regimes of spreading are considered. The evolution equation deduced for the shape of the spreading drops has self-similar solutions, which allows obtaining spreading laws for both gravitational and capillary regimes of spreading. In the gravitational regime case of spreading the profile of the spreading drop is provided.