Fluidization

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Oscillatory flow over a saturated bed of glass beads (Experiment at Cornell University with J.T. Jenkins, G. Bewley and K. Laurent)

A sketch corresponding to the upward motions of the plate. The motion of the grains follows the plate in the upward motion but not in the downward.

Expansions of the bed over yellow particles

(Experiment at Cornell University with J.T. Jenkins, G. Bewley and K. Laurent)

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Oscillatory flow over a saturated bed of plastic beads (Experiment at Cornell University with J.T. Jenkins, G. Bewley and K. Laurent)

Fluidization induced by vibrations

The experimental activity was devoted to understanding ripple formation on a fully saturated granular aggregate, in the absence of shearing flow. The morphology of a sand bed, immersed in water, is modified because of pressure gradients generated in the fluid saturated particle. These vertical pressure gradients are predicted by a theoretical model and so fluidization of the bed (PRL, 2019).

Collaborations

James Thomas Jenkins, Cornell University (USA)

Greg Bewley, Cornell University (USA)

Kasey Laurent, Cornell University (USA)

This research was supported by Office of Naval Research Global (ONR), London, Grant # N62909-17-1-2048

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