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Compaction of liquid immersed granular packings by small upward flows
Phys. Rev. Fluids 4, 074308 – Published 19 July, 2019
DOI: https://doi.org/10.1103/PhysRevFluids.4.074308
Abstract
We study experimentally the compaction dynamics of a fully immersed granular packing subjected to a slow upward flow. We consider continuous flows as well as discontinuous flows featuring short flow bursts that act as flow “taps.” We monitor the compaction rate of initial packings prepared by settling, and we find that compaction is possible for a continuous flow with upward velocities below the fluidization threshold. Flow bursts are found strongly to enhance the compaction efficiency, especially when the bursts are above the fluidization threshold.
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