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Viscoplastic squeeze flow between two identical infinite circular cylinders

Accepted version
Peer-reviewed

Type

Article

Change log

Authors

Koblitz, AR 
Lovett, S 
Nikiforakis, Nikolaos  ORCID logo  https://orcid.org/0000-0002-6694-2362

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.

Description

Keywords

physics.flu-dyn, physics.flu-dyn, 76A05

Journal Title

Physical Review Fluids

Conference Name

Journal ISSN

2469-990X
2469-990X

Volume Title

3

Publisher

APS Physics
Sponsorship
EPSRC (1602295)
Engineering and Physical Sciences Research Council (EP/L015552/1)