Persistent holes in a fluid.
Persistent holes in a fluid.
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流体中存在持续的孔洞。
DOI：
10.1103/physrevlett.92.184501
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发表时间：
2003
影响因子：
8.6
通讯作者：
H. Swinney
中科院分区：
文献类型：
--
作者：
F. Merkt;R. Deegan;D. Goldman;E. Rericha;H. Swinney
我们在垂直振荡的0.5 cm深的玉米淀粉悬浮液中观察到稳定的孔。只有在加速度大于10g的情况下对层施加有限扰动时，才会出现空穴。孔洞是圆形的，大约0.5厘米宽，可以持续10(6)个周期以上。在大约等于17g的压力下，孔的边缘变得不稳定，产生手指状突起或孔分裂。在更高的加速度下，孔洞离域，以不规则的波动覆盖整个表面。我们在玻璃微球的水悬浮液中发现了类似的行为。
We observe stable holes in a vertically oscillated 0.5 cm deep aqueous suspension of cornstarch. Holes appear only if a finite perturbation is applied to the layer for accelerations a above 10g. Holes are circular and approximately 0.5 cm wide, and can persist for more than 10(6) cycles. Above a approximately equal to 17g the rim of the hole becomes unstable, producing fingerlike 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.