Onset of dissolution-driven instabilities in fluids with nonmonotonic density profile

Analog systems have recently been used in several experiments in the context of convective mixing of CO(2). We generalize the nonmonotonic density dependence of the growth of instabilities and provide a scaling relation for the onset of instability. The results of linear stability analysis and direc...

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Published in:Physical review. E, Statistical, nonlinear, and soft matter physics Statistical, nonlinear, and soft matter physics, 2015-11, Vol.92 (5), p.053023-053023, Article 053023
Main Authors: Raad, Seyed Mostafa Jafari, Hassanzadeh, Hassan
Format: Article
Language:English
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Summary:Analog systems have recently been used in several experiments in the context of convective mixing of CO(2). We generalize the nonmonotonic density dependence of the growth of instabilities and provide a scaling relation for the onset of instability. The results of linear stability analysis and direct numerical simulations show that these fluids do not resemble the dynamics of CO(2)-water convective instabilities. A typical analog system, such as water-propylene glycol, is found to be less unstable than CO(2)-water. These results provide a basis for further research and proper selection of analog systems and are essential to the interpretation of experiments.
ISSN:1539-3755
1550-2376
DOI:10.1103/PhysRevE.92.053023