Journal article

Dynamics of stain growth from sessile droplets on paper

Michael J Hertaeg, Rico F Tabor, Joseph D Berry, Gil Garnier

JOURNAL OF COLLOID AND INTERFACE SCIENCE | ACADEMIC PRESS INC ELSEVIER SCIENCE | Published : 2019

Abstract

HYPOTHESIS: The rate of stain growth of a sessile droplet deposited on paper has been previously studied (Kissa, 1981; Danino and Marmur, 1994; Kawase et al., 1986; Borhan and Rungta, 1993) but is not fully understood. In particular, the mechanism by which the abrupt decrease in growth rate occurs is unknown. This process is expected to follow a model where the disappearance of the droplet is represented by a change to the boundary condition at the droplet-paper interface when the volume of the fluid inside the paper is equal to the volume of the simulated droplet. EXPERIMENTS: The stain size of sessile droplets on paper was monitored against time. A series of fluids varying in surface tensi..

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University of Melbourne Researchers