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arXiv · 1910.02652

Sediment creep triggered by porous flow

Morgane Houssais·Charles Maldarelli·Jeffrey F. Morris
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Abstract

Quasi-2D experiments of a submerged sediment layer creeping downward were performed, varying the channel tilt and a porous flow under the respective thresholds for yielding. Logarithmic decay rates of the deformation are observed, with the rate increasing with both control parameters. A new dimensionless parameter, $P^*$, accounting for both mean porous flow and gravity force effects on particle motion, allows a collapse of all the deformation results on a single curve. Two distinct creep regimes are identified, and correspond to a systematic change of the void size distribution as $P^*$ increases.

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Morgane Houssais, Charles Maldarelli, Jeffrey F. Morris. 2020-02-16. Sediment creep triggered by porous flow. https://doi.org/10.1103/physrevfluids.6.l012301

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