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Flow regimes of a fluid driven granular suspension
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Bureau, Romain, Brand, Samuel, Ball, Robin and Nicodemi, Mario (2012) Flow regimes of a fluid driven granular suspension. Granular Matter, Vol.14 (No.2). pp. 175-178. doi:10.1007/s10035-011-0295-y
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Official URL: http://dx.doi.org/10.1007/s10035-011-0295-y
Abstract
We discuss molecular dynamics simulations of a granular suspension driven in a channel by an embedding fluid. The flow has three different regimes: it is disordered at small packing fractions, ϕ ; above a transition point, ϕm , flows becomes ordered in layers, but only in a fraction of samples; at higher ϕ , if ordering is avoided, jamming is also encountered. In the disordered flow regime the velocity profile is power law, consistent with an Ostwald-de Waele constitutive relation. In the ordered regime, flow is concentrated in the bulk in a nearly solid plug having a flat velocity profile, with narrow shear regions at the boundaries. Interestingly, velocity fluctuations are approximately linear in the velocity in all regimes.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Divisions: | Faculty of Science > Physics | ||||
| Journal or Publication Title: | Granular Matter | ||||
| Publisher: | Springer | ||||
| ISSN: | 1434-5021 | ||||
| Official Date: | 2012 | ||||
| Dates: |
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| Volume: | Vol.14 | ||||
| Number: | No.2 | ||||
| Page Range: | pp. 175-178 | ||||
| DOI: | 10.1007/s10035-011-0295-y | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access |
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