Critical Phenomena of a Drop Through a Stratified Fluid - Selected Topics of Computational and Experimental Fluid Mechanics - page 475

Fig. 4 Chandelier: There is an interval of 1.6 s between ( a )and( b ), and 1.4 s between ( b )and( c )
Fig. 5 Core Fallout: The wake can be seen very clearly on panel ( a ). The vortex touches the
interface in ( b ), and a bubble in the middle of the core seems to make the vortex rise again
and stays floating in the middle of the top layer (Fig. 5 c). A bubble is formed in the
middle of the core before the material rises from the interface.
3.4 Rebound
Both the radius of the drop and the thickness of the top layer are reduced. This time
the vortex ring touches (Fig. 6 a) and traverses (Fig. 6 b) the interface, then a bubble
is formed and the material rebounds (Fig. 6 c).
All results are summarized on Table 1 .
Camassa et al. ( 2013 ) present a graph of stability, shown in Fig. 7 , that relates
experimental to theoretical data. The experimental data of this work are presented in
the same figure.
The blue line shows the theoretical limit of stability. The green line shows the
experimental results presented in Camassa et al. ( 2011 ). The experimental results of
this work remain mostly in the trapped region, except for the rebound.