Viscoplastic squeeze flow between two identical infinite circular cylinders
Accepted version
Peer-reviewed
Repository URI
Repository DOI
Change log
Authors
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
Journal Title
Conference Name
Journal ISSN
2469-990X
Volume Title
Publisher
Publisher DOI
Sponsorship
Engineering and Physical Sciences Research Council (EP/L015552/1)