Flow of viscoplastic fluids in eccentric annular geometries

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A classification of flowfields for the flow of a Bingham fluid in general eccentric annular geometries is presented. Simple arguments show that a singularity can exist in the stress gradient on boundaries between zones with yielded and un-yielded fluid respectively. A Finite Element code is used to verify this property of the Bingham fluid. An analytical solution for the flowfield in case of small eccentricities is derived.
Original languageEnglish
JournalJournal of Non-Newtonian Fluid Mechanics
Issue number2
Pages (from-to)149-169
Publication statusPublished - 1992

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