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Effect of phase change and solute diffusion on spreading on a dissolving substrate
KTH, School of Engineering Sciences (SCI), Physics.ORCID iD: 0000-0003-3132-7252
KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.ORCID iD: 0000-0003-3336-1462
2009 (English)In: Acta Materialia, ISSN 1359-6454, E-ISSN 1873-2453, Vol. 57, no 20, 6022-6036 p.Article in journal (Refereed) Published
Abstract [en]

Dissolutive wetting is investigated numerically using a diffuse-interface model that incorporates fluid flow, solute diffusion and phase change. A range of materials parameters are investigated: (1) permitting recovery of the hydrodynamic limit by suppressing the dissolution of the substrate and (2) evaluating the role of diffusion. The time history of droplet size, droplet concentration and angles between the interfaces are given. For cases in which convection dominates, the dynamics of spreading agrees with a known hydrodynamic model for spreading of inert fluids. A phase change increases wetting speed, due to a condensation that takes place near the triple junction. There is also a strong dependence of the wetting kinetics on the solute diffusivities. Details of composition changes during spreading are also discussed, such as the composition path of the bulk liquid probed at different locations in the drop. Published by Elsevier Ltd on behalf of Acta Materialia Inc.

Place, publisher, year, edition, pages
2009. Vol. 57, no 20, 6022-6036 p.
Keyword [en]
Dissolutive wetting, Diffusion, Navier-Stokes flow, Multicomponent and, multiphase model, Phase-field method, fluid interface, surface-tension, contact-line, dynamics, solidification, simulations, mechanisms, liquids, drop
National Category
Fluid Mechanics and Acoustics Metallurgy and Metallic Materials
URN: urn:nbn:se:kth:diva-18985DOI: 10.1016/j.actamat.2009.08.033ISI: 000272111800009ScopusID: 2-s2.0-70350536972OAI: diva2:337032

QC 20100525

Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2016-04-20Bibliographically approved

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