Periodic knolls and valleys: coexistence of solid and liquid states in granular suspensions.
We report the spontaneous emergence of a doubly periodic train of sedimented knolls in a dense suspension. These solidified knolls rise out of, and coexist alongside, a sea of freely flowing liquid in a slowly rotating horizontal bottle. We apply a variable viscosity model that permits simultaneous analysis of fluidlike and solidlike behaviors that are ubiquitous in a variety of sedimenting flows. The model generates qualitative agreement with experiments, and produces new insights into mechanisms by which sedimented structures form.
Duong
Nhat-Hang P
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Department of Chemical & Biochemical Engineering, Rutgers University, 98 Brett Road, Piscataway, New Jersey 08854, USA.
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