On the sedimentation velocity of spheres in a polymeric liquid

Henrik Koblitz Rasmussen, Ole Hassager

Research output: Contribution to journalJournal articleResearchpeer-review


A Lagrangian finite element method is used to simulate the transient sedimentation of spheres in polymeric liquids. The liquid is described by an integral constitutive equation of the Rivlin-Sawyers type. The simulations show a marked increase in the drag, which is apparently related to the elongational flow in the wake. Furthermore, the results indicate that the sedimenting sphere geometry is a possible candidate for a rheometer capable of providing information about fluids in extensional flows.
Original languageEnglish
JournalChemical Engineering Science
Issue number9
Pages (from-to)1431-1440
Publication statusPublished - 1996

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