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Fluids 2018, 3(4), 78; https://doi.org/10.3390/fluids3040078

A Computational Model for the Analysis of Spreading of Viscoelastic Droplets over Flat Surfaces

1
Chemical Process & Energy Resources Institute, 6th km Harilaou-Thermi rd., P.O. Box 60361, Thessaloniki 57001, Greece
2
Department of Chemical Engineering, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
*
Author to whom correspondence should be addressed.
Received: 7 September 2018 / Revised: 17 October 2018 / Accepted: 19 October 2018 / Published: 22 October 2018
(This article belongs to the Special Issue Experimental and Numerical Studies in Biomedical Engineering)
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Abstract

The spreading of viscous and viscoelastic fluids on flat and curved surfaces is an important problem in many industrial and biomedical processes. In this work the spreading of a linear viscoelastic fluid with changing rheological properties over flat surfaces is investigated via a macroscopic model. The computational model is based on a macroscopic mathematical description of the gravitational, capillary, viscous, and elastic forces. The dynamics of droplet spreading are determined in sessile and pendant configurations for different droplet extrusion or formation times for a hyaluronic acid solution undergoing gelation. The computational model is employed to describe the spreading of hydrogel droplets for different extrusion times, droplet volumes, and surface/droplet configurations. The effect of extrusion time is shown to be significant in the rate and extent of spreading. View Full-Text
Keywords: spreading; gelation; hydrogel; hyaluronic; viscoelastic; viscous; gravitational; capillary spreading; gelation; hydrogel; hyaluronic; viscoelastic; viscous; gravitational; capillary
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Alexopoulos, A.H.; Kiparissides, C. A Computational Model for the Analysis of Spreading of Viscoelastic Droplets over Flat Surfaces. Fluids 2018, 3, 78.

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