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Stochastic transitions and jamming in granular pipe flow
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Brand, Samuel, Ball, Robin and Nicodemi, Mario (2011) Stochastic transitions and jamming in granular pipe flow. Physical Review E (Statistical, Nonlinear, and Soft Matter Physics), Vol.83 (No.3). Article 031309. doi:10.1103/PhysRevE.83.031309 ISSN 1539-3755.
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Official URL: http://dx.doi.org/10.1103/PhysRevE.83.031309
Abstract
We study a model granular suspension driven down a channel by an embedding fluid via computer simulations. We characterize the different system flow regimes and the stochastic nature of the transitions between them. For packing fractions below a threshold ϕm, granular flow is disordered and exhibits an Ostwald–de Waele–type power-law shear-stress constitutive relation. Above ϕm, two asymptotic states exist; disordered flow can persist indefinitely, yet, in a fraction of samples, the system self-organizes in an ordered form of flow where grains move in parallel ordered layers. In the latter regime, the Ostwald–de Waele relationship breaks down and a nearly solid plug appears in the center, with linear shear regions at the boundaries. Above a higher threshold ϕg, an abrupt jamming transition is observed if ordering is avoided.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QC Physics T Technology > TA Engineering (General). Civil engineering (General) |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Library of Congress Subject Headings (LCSH): | Stochastic processes, Pipe -- Fluid dynamics -- Computer simulations, Granular materials -- Fluid dynamics -- Computer simulations | ||||
Journal or Publication Title: | Physical Review E (Statistical, Nonlinear, and Soft Matter Physics) | ||||
Publisher: | American Physical Society | ||||
ISSN: | 1539-3755 | ||||
Official Date: | 2011 | ||||
Dates: |
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Volume: | Vol.83 | ||||
Number: | No.3 | ||||
Number of Pages: | 4 | ||||
Page Range: | Article 031309 | ||||
DOI: | 10.1103/PhysRevE.83.031309 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published |
Data sourced from Thomson Reuters' Web of Knowledge
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