Viscoplastic squeeze flow between two identical infinite circular cylinders
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Publication Date
2018-02-28Journal Title
Physical Review Fluids
ISSN
2469-990X
Publisher
APS Physics
Volume
3
Issue
2
Number
023301
Language
English
Type
Article
This Version
AM
Metadata
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Koblitz, A., Lovett, S., & Nikiforakis, N. (2018). Viscoplastic squeeze flow between two identical infinite circular cylinders. Physical Review Fluids, 3 (2. 023301)https://doi.org/10.1103/PhysRevFluids.3.023301
Abstract
Direct numerical simulations of closely interacting infinite circular cylinders in a Bingham fluid are presented, and results compared to asymptotic solutions based on lubrication theory in the gap. Unlike for a Newtonian fluid, the macroscopic flow outside of the gap between the cylinders is shown to have a large effect on the pressure profile within the gap and the resulting lubrication force on the cylinders. The presented results indicate that the asymptotic lubrication solution can be used to predict the lubrication pressure only if the surrounding viscoplastic matrix is yielded by a macroscopic flow. This has implications for the use of subgrid-scale lubrication models in simulations of noncolloidal particulate suspensions in viscoplastic fluids.
Sponsorship
EPSRC (1602295)
EPSRC (EP/L015552/1)
Identifiers
External DOI: https://doi.org/10.1103/PhysRevFluids.3.023301
This record's URL: https://www.repository.cam.ac.uk/handle/1810/275844
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