Journal
PHYSICAL REVIEW LETTERS
Volume 93, Issue 21, Pages -Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.93.214502
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We present an experimental study of the coiling instability of a liquid rope falling on a solid surface. Coiling can occur in three different regimes-viscous, gravitational, or inertial-depending on the fluid viscosity and density, the fall height, and the flow rate. The competition among the different forces causes the coiling frequency first to decrease and subsequently to increase with increasing height. We also observe an oscillation between two coiling states in the gravitational-to-inertial transitional range, reflecting the multivaluedness of the dependence of coiling frequency on fall height. The data can be rescaled in a universal way, and agree very well with numerically predicted coiling frequencies.
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