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Title: Visualizations of the dynamics of vortical flow
Description:
This video documents a direct numerical simulation of an experiment by Niederhaus and Jacobs [Phys. Fluids 10, S6 (1998)]. The animations illustrate the behavior of two high-Schmidt-number, incompressible fluids of different densities that are initially separated by a sinusoidal interface and then impulsively accelerated. The acceleration results in the deposition, on the density interface, of baroclinic vorticity that coalesces into a single large vortex. At intermediate time, when the density interface is rolled up by this large vortex, the low-pressure region caused by the vortex interacts with the steep density gradients, producing new baroclinic vorticity. We term this secondary instability a centrifugal baroclinic instability. Credits: Paul Miller, Peter Lindstrom, and Andrew Cook References: Web Page: http://pof.aip.org/pof/gallery/2003-miller.jsp#video Contributed By: Tausif Billah |