Critical Phenomena of a Drop Through a Stratified Fluid - Selected Topics of Computational and Experimental Fluid Mechanics - page 477

4 Conclusions and Future Work
The four phenomena reported by Camassa et al. were reproduced and observed with
a better visualization technique. Besides, in this paper the exact value of the initial
and boundary conditions are reported for each case.
Through the shadowgraphs the density gradient can be clearly observed, in par-
ticular the interface, the wake behind the vortex and the bubble.
From the experiments it can be concluded that the evolution and stability of a
vortex ring that moves through a stratified fluid is strongly dependent on the initial
and boundary conditions. This is typical of nonlinear systems. The process is difficult
to study theoretically and even numerically.
The transitions between different regions of stabilitywill be studied inmore detail.
The effect of changes in the parameters in the behavior of the vortex ring will be
recorded. Also, the behavior of a drop of a fluid immiscible in the other two, will be
analyzed.
To see the video of the experiments described in this paper go to the video: https://
www.youtube.com/watch?v=Txsw2NcUW2A or use the following QR:
References
Camassa R, Khatri S, McLaughlin R, Mertens K, Monbureau E, Nenon D, White B (2011) The
trapping and escape of buoyant vortex rings in sharply stratified fluids. arXiv:1110.3435
Camassa R, Khatri S, McLaughlin R, Mertens K, Nenon D, Smith C, Viotti C (2013) Numerical
simulations and experimental measurements of dense-core vortex rings in a sharply stratified
environment. Comput Sci Discov 6(1):014001
Settles GS (2001) Schlieren and shadowgraph techniques. Springer, Berlin