Pressure-driven suspension flow near jamming

Physical Review Letters
Sangwon OhJean Desroches

Abstract

We report here magnetic resonance imaging measurements performed on suspensions with a bulk solid volume fraction (ϕ_{0}) up to 0.55 flowing in a pipe. We visualize and quantify spatial distributions of ϕ and velocity across the pipe at different axial positions. For dense suspensions (ϕ_{0}>0.5), we found a different behavior compared to the known cases of lower ϕ_{0}. Our experimental results demonstrate compaction within the jammed region (characterized by a zero macroscopic shear rate) from the jamming limit ϕ_{m}≈0.58 at its outer boundary to the random close packing limit ϕ_{rcp}≈0.64 at the center. Additionally, we show that ϕ and velocity profiles can be fairly well captured by a frictional rheology accounting for both further compaction of jammed regions as well as normal stress differences.

References

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Citations

Dec 3, 2015·The Journal of Chemical Physics·S Papenkort, Th Voigtmann
Apr 14, 2016·Annual Review of Chemical and Biomolecular Engineering·Alexander C BarbatiGareth H McKinley
Jul 12, 2019·Proceedings. Mathematical, Physical, and Engineering Sciences·E V DontsovD Yu Derbyshev
Jun 9, 2017·Annual Review of Chemical and Biomolecular Engineering·Lynn F Gladden, Andrew J Sederman
Oct 22, 2019·Physical Review Letters·Rory E O'NeillWilson C K Poon
Aug 19, 2016·Soft Matter·Ghata M Nirmal, Arun Ramachandran
Nov 17, 2020·Physical Review Letters·J J J Gillissen, C Ness

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