Liquid migration in shear thickening suspensions flowing through constrictions

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

Dense suspensions often become more dilute as they move downstream through a constriction. We find that as a shear-thickening suspension is extruded through a narrow die and undergoes such liquid migration, the extrudate maintains a steady concentration ϕLMout, independent of time or initial concentration. At low volumetric flow rate Q, ϕLMout is a universal function of Q/r3d, a characteristic shear rate in the die of radius rd, and coincides with the critical input concentration for the onset of LM, ϕcritin. We predict this function by coupling the Wyart-Cates model for shear thickening and the “suspension balance model” for solvent permeation through particles.
Original languageEnglish
Number of pages5
JournalPhysical Review Letters
Early online date16 Sept 2019
Publication statusPublished - 20 Sept 2019

Keywords / Materials (for Non-textual outputs)

  • cond-mat.soft


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