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Study on Apparent Viscosity of Foam and Droplet Movement Using a Cold Model
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.ORCID iD: 0000-0002-4424-343X
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.ORCID iD: 0000-0002-3548-8638
2016 (English)In: Steel Research International, ISSN 1611-3683, E-ISSN 1869-344X, Vol. 87, no 6, 712-719 p.Article in journal (Refereed) Published
Abstract [en]

The apparent viscosities of foams generated by passing argon through silicone oil are measured. The foams are found to be non-Newtonian flows having apparent viscosities 4-5 times higher than the dynamic viscosity of the origin fluid. The movements of different particles and droplets and their residence times are studied. The measured average velocities of the particles/droplets are substantially lower than the values estimated based on the dynamic viscosities. For both mechanical and gas stirrings, the flows of the foam are very different from pure liquid. The movement of the bar and stirring gas bubbles only pushes a limited number of bubbles which are very close to them to move. No bulk flow as in pure liquid is generated by the stirring. The apparent viscosities of foams generated by passing argon through silicone oil are measured. The foams are found to be non-Newtonian flows and have apparent viscosities about 4-5 times higher than the dynamic viscosity. The average velocities of the particles/droplets moving in the foam are substantially lower than the values estimated based on the dynamic viscosities of the oils.

Place, publisher, year, edition, pages
Wiley-VCH Verlagsgesellschaft, 2016. Vol. 87, no 6, 712-719 p.
Keyword [en]
apparent viscosity, Emulsion, Particle behavior, Steelmaking
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:kth:diva-194550DOI: 10.1002/srin.201500200ScopusID: 2-s2.0-84973530989OAI: oai:DiVA.org:kth-194550DiVA: diva2:1042531
Note

QC 20161031

Available from: 2016-10-31 Created: 2016-10-31 Last updated: 2016-10-31Bibliographically approved

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Martinsson, JohanSichen, Du
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