Spacial and temporal dynamics of the volume fraction of the colloidal particles inside a drying sessile drop

Abstract

Using lubrication theory, drying processes of sessile colloidal droplets on a solid substrate are studied. A simple model is proposed to describe temporal dynamics both the shape of the drop and the volume fraction of the colloidal particles inside the drop. The concentration dependence of the viscosity is taken into account. It is shown that the final shapes of the drops depend on both the initial volume fraction of the colloidal particles and the capillary number. The results of our simulations are in a reasonable agreement with the published experimental data. The computations for the drops of aqueous solution of human serum albumin (HSA) are presented.

Submitted to EPJE, 7 pages, 8 figures

References in corpus (3)

• Patterns Formation in Drying Drops of Blood
• Pattern formation during the evaporation of a colloidal nanoliter drop: a numerical and experimental study
• Segregation in desiccated sessile drops of biological fluids

Cited by in corpus (8)

• Patterned deposition at moving contact lines
• Modelling the formation of structured deposits at receding contact lines of evaporating solutions and suspensions
• Applying Droplets and Films in Evaporative Lithography
• Insights into the mechanics of pure and bacteria-laden sessile whole blood droplet evaporation
• Suppression of sawtooth oscillations when using a finite-difference scheme for mass transfer simulation via the lubrication approximation in a droplet evaporated on a substrate
• Simulation aspects of patterning polymer films via evaporative lithography and composite substrates
• Pattern formation in desiccated sessile colloidal droplets with salt admixture: Short review
• Simple Model of Shape Evolution of Desiccated Colloidal Sessile Drop