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Experimental and numerical investigation of bubble migration in shear flow: Deformability-driven chaining and repulsion
Univ Oslo, Dept Math, Oslo, Norway.;SINTEF Ind Petr, Trondheim, Norway..
KTH, School of Engineering Sciences (SCI), Engineering Mechanics, Fluid Mechanics and Engineering Acoustics, Tillämpad strömningsmekanik. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, Centres, SeRC - Swedish e-Science Research Centre.ORCID iD: 0000-0003-1429-1008
Univ Oslo, Dept Math, Oslo, Norway..
KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, Centres, SeRC - Swedish e-Science Research Centre. KTH, School of Engineering Sciences (SCI), Engineering Mechanics, Fluid Mechanics and Engineering Acoustics. NTNU, Dept Energy & Proc Engn, Trondheim, Norway..ORCID iD: 0000-0002-4346-4732
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2023 (English)In: Physical Review Fluids, E-ISSN 2469-990X, Vol. 8, no 6, article id 063602Article in journal (Refereed) Published
Abstract [en]

We study the interaction-induced migration of bubbles in shear flow and observe that bubbles suspended in elastoviscoplastic emulsions organize into chains aligned in the flow direction, similarly to particles in viscoelastic fluids. To investigate the driving mechanism, we perform experiments and simulations on bubble pairs, using suspending fluids with different rheological properties. First, we notice that, for all fluids, the interaction type depends on the relative position of the bubbles. If they are aligned in the vorticity direction, then they repel, if not, then they attract each other. The simulations show a similar behavior in Newtonian fluids as in viscoelastic and elastoviscoplastic fluids, as long as the capillary number is sufficiently large. This shows that the interaction-related migration of the bubbles is strongly affected by the bubble deformation. We suggest that the cause of migration is the interaction between the heterogeneous pressure fields around the deformed bubbles, due to capillary pressure.

Place, publisher, year, edition, pages
American Physical Society (APS) , 2023. Vol. 8, no 6, article id 063602
National Category
Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:kth:diva-332199DOI: 10.1103/PhysRevFluids.8.063602ISI: 001019545300003Scopus ID: 2-s2.0-85164008146OAI: oai:DiVA.org:kth-332199DiVA, id: diva2:1783535
Note

QC 20230721

Available from: 2023-07-21 Created: 2023-07-21 Last updated: 2023-07-21Bibliographically approved

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Iqbal, Kazi TassawarBrandt, LucaTammisola, Outi

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Tillämpad strömningsmekanikLinné Flow Center, FLOWSeRC - Swedish e-Science Research CentreFluid Mechanics and Engineering Acoustics
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