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Impact of viscoelastic droplets
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.ORCID iD: 0000-0002-1837-5439
KTH, School of Engineering Sciences (SCI), Mechanics.ORCID iD: 0000-0003-2830-0454
KTH, School of Engineering Sciences (SCI), Mechanics.ORCID iD: 0000-0003-3336-1462
2017 (English)In: Journal of Non-Newtonian Fluid Mechanics, ISSN 0377-0257, E-ISSN 1873-2631, Vol. 243, 38-46 p.Article in journal (Refereed) Published
Abstract [en]

We conduct numerical experiments on viscoelastic droplets hitting a flat solid surface. The results present time-resolved non-Newtonian stresses acting in the droplet. Comparing with the simulation of the impact of a Newtonian droplet, the effects of viscoelasticity on droplet behaviors such as splashing, the maximum spreading diameter and deformation are analyzed. With detailed information on the contact line region, we demonstrate how the contact line behaves according to the transition of the fluid property from elasticity dominated to shear-thinning dominated when a droplet expands and contracts on the substrate. The propose of this work is to discuss whether and how the elasticity in an impinging droplet takes effect.

Place, publisher, year, edition, pages
Elsevier, 2017. Vol. 243, 38-46 p.
Keyword [en]
Contact line, Diffuse interface, Droplet impact, Dynamic wetting, Viscoelasticity, Drops, Elasticity, Non Newtonian flow, Shear thinning, Contact line regions, Contact lines, Droplet behaviors, Numerical experiments, Spreading diameters, Drop breakup
National Category
Applied Mechanics
Identifiers
URN: urn:nbn:se:kth:diva-207327DOI: 10.1016/j.jnnfm.2017.03.003ISI: 000401379500004Scopus ID: 2-s2.0-85016417160OAI: oai:DiVA.org:kth-207327DiVA: diva2:1106680
Note

QC 20170608

Available from: 2017-06-08 Created: 2017-06-08 Last updated: 2017-11-10Bibliographically approved

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Weihong, YangDo-Quang, MinhAmberg, Gustav

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  • apa
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