Estimation of structural film viscosity based on the bubble rise method in a nanofluid

Estimation of structural film viscosity based on the bubble rise method in a nanofluid Journal of Colloid and Interface Science 516 (2018) 312–316 Contents lists available at ScienceDirect Journal of Colloid and Interface Science journal homepage: www.elsevier.com/locate/jcis Regular Article Estimation of structural film viscosity based on the bubble rise method in a nanofluid Heon Ki Cho, Alex D. Nikolov, Darsh T. Wasan Department of Chemical Biological Engineering, Illinois Institute of Technology, Chicago, IL 60616, United States graphical a bstract ar ti c l e i nf o ab stra ct Article history: When a single bubble moves at a very low capillary number (10 ) through a liquid with dispersed Received 12 December 2017 nanoparticles (nanofluid) inside a vertical tube/capillary, a film is formed between the bubble surface Revised 17 January 2018 and the tube wall and the nanoparticles self-layer inside the confined film. We measured the film thick- Accepted 18 January 2018 ness using reflected light interferometry. We calculated the film structural energy isotherm vs. the film Available online 31 January 2018 thickness from the film-meniscus contact angle measurements using the reflected light interferometric method. Based on the experimental measurement of the film thickness and the calculated values of Keywords: the film structural energy barrier, we estimated the structural film viscosity vs. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Colloid and Interface Science Elsevier

Estimation of structural film viscosity based on the bubble rise method in a nanofluid

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Publisher
Elsevier
Copyright
Copyright © 2018 Elsevier Inc.
ISSN
0021-9797
eISSN
1095-7103
D.O.I.
10.1016/j.jcis.2018.01.066
Publisher site
See Article on Publisher Site

Abstract

Journal of Colloid and Interface Science 516 (2018) 312–316 Contents lists available at ScienceDirect Journal of Colloid and Interface Science journal homepage: www.elsevier.com/locate/jcis Regular Article Estimation of structural film viscosity based on the bubble rise method in a nanofluid Heon Ki Cho, Alex D. Nikolov, Darsh T. Wasan Department of Chemical Biological Engineering, Illinois Institute of Technology, Chicago, IL 60616, United States graphical a bstract ar ti c l e i nf o ab stra ct Article history: When a single bubble moves at a very low capillary number (10 ) through a liquid with dispersed Received 12 December 2017 nanoparticles (nanofluid) inside a vertical tube/capillary, a film is formed between the bubble surface Revised 17 January 2018 and the tube wall and the nanoparticles self-layer inside the confined film. We measured the film thick- Accepted 18 January 2018 ness using reflected light interferometry. We calculated the film structural energy isotherm vs. the film Available online 31 January 2018 thickness from the film-meniscus contact angle measurements using the reflected light interferometric method. Based on the experimental measurement of the film thickness and the calculated values of Keywords: the film structural energy barrier, we estimated the structural film viscosity vs.

Journal

Journal of Colloid and Interface ScienceElsevier

Published: Apr 15, 2018

References

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