Flow development in compression of a finite amount of a Bingham plastic
AuthorFlorides, G. C.
Alexandrou, Andreas N.
Georgiou, G. C.
SourceJournal of Non-Newtonian Fluid Mechanics
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The flow and shape evolution during the compression of a finite amount of a Bingham plastic is investigated by means of numerical simulations. The problem relates to the popular compression test used for the rheological characterization of non-Newtonian fluids. The flow is modelled in Lagrangian coordinates using the Papanastasiou regularization for the Bingham plastic and a mixed-Galerkin finite element method. Simulations have been performed for compression under both constant load and constant velocity. Results for various Reynolds and Bingham numbers are presented and discussed. © 2007 Elsevier B.V. All rights reserved.