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On the Interaction of Side-By-Side Circular Cylinders in Viscoplastic Fluids
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.ORCID iD: 0000-0001-5294-1855
2019 (English)In: Fluids, ISSN 2311-5521, Vol. 4, no 2, article id 93Article in journal (Refereed) Published
Abstract [en]

In this paper, the static interaction of a train of three cylinders in a Bingham fluid is studiednumerically using Computational Fluid Dynamics. The variation of drag forces for the cylinders inseveral configurations is investigated. Positions of the particles in relation to the reference particleare recognized by the separation distance between the cylinders. A steady state field is considered,with Bingham numbers between 5 and 150. Several separation distances (d) were considered, such that2.0D d 6.0D where D is the cylinder diameter. The Reynolds number was chosen in the range of5 Re 40. In particular, the eect of the separation distance, Reynolds number and Bingham numberon the shape and size of the unyielded regions was investigated. The functional dependence of thisregion and the drag coecient is explored. The present results reveal the significant influence of thegap between the cylinders on the drag force and the shape of the unyielded regions surrounding thecylinders. It was found that there are several configurations in which the drag forces over the first andthe third cylinders are almost equal depending on variation of the Bi, Re and the separation distance.

Place, publisher, year, edition, pages
MDPI, 2019. Vol. 4, no 2, article id 93
Keywords [en]
particle interaction, viscoplastic fluid, Bingham fluid, computational fluid dynamics
National Category
Fluid Mechanics and Acoustics
Research subject
Fluid Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-74059DOI: 10.3390/fluids4020093ISI: 000475331700035Scopus ID: 2-s2.0-85069779541OAI: oai:DiVA.org:ltu-74059DiVA, id: diva2:1318355
Note

Validerad;2019;Nivå 2;2019-05-27 (oliekm)

Available from: 2019-05-27 Created: 2019-05-27 Last updated: 2019-08-21Bibliographically approved

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Hamedi, NaserWesterberg, Lars-Göran

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