Criticality of Density Intrusionsby Steven J. Wright, Univ of Michigan, Ann Arbor, United States,
Diana Paez-Rivadeneira, Univ of Michigan, Ann Arbor, United States,
Abstract: Previous analyses of density intrusions indicates that a steady interface cannot be maintained if the front propagates at a speed greater than that of long interfacial waves. Supercritical intrusions have been observed in the experiments of Wright (1986). The flow conditions for which such a density current will occur are outlined. A previously derived condition utilizing minimum energy principles is found to adequately describe the observed density current propagation speeds.
Subject Headings: Density currents | Wave propagation | Water waves | Fluid flow | Hydrologic models | Long waves
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