Falling Jets of Particles in Viscous Fluids

Details Falling Jets of Particles in Viscous Fluids Falling Jets of Particles in Viscous Fluids

2008-10-11

arxiv.org/abs/0810.1990v1

Physics

Fluid Dynamics

Accompanies video submission to APS DFD 2008 Gallery of Fluid Motion

Scientific paper

This fluid dynamics video presents experiments and simulations of gravity-driven particulate jets in viscous fluids at low Reynolds number. An initially straight jet is shown to develop varicose modulations of its diameter as it sediments under the action of gravity. While this instability is qualitatively reminiscent of the classical Rayleigh-Plateau instability for immiscible fluids, its mechanism has yet to be understood as neither inertia nor surface tension play a role in the case of a dilute suspension at Re=0.

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