Persistent holes in a fluid

Details Persistent holes in a fluid Persistent holes in a fluid

2003-11-14

arxiv.org/abs/nlin/0311026v1

Nonlinear Sciences

Pattern Formation and Solitons

4 pages, 6 figures

Scientific paper

10.1103/PhysRevLett.92.184501

We observe stable holes in a vertically oscillated 0.5 cm deep aqueous suspension of cornstarch for accelerations a above 10g. Holes appear only if a finite perturbation is applied to the layer. Holes are circular and approximately 0.5 cm wide, and can persist for more than 10^5 cycles. Above a = 17g the rim of the hole becomes unstable producing finger-like protrusions or hole division. At higher acceleration, the hole delocalizes, growing to cover the entire surface with erratic undulations. We find similar behavior in an aqueous suspension of glass microspheres.

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