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Onset of dissolution-driven instabilities in fluids with nonmonotonic density profile
Seyed Mostafa Jafari Raad1, Hassan Hassanzadeh1
1Department of Chemical and Petroleum Engineering, Schulich School of Engineering, University of Calgary, 2500 University Drive NW, Calgary, Alberta, Canada T2N 1N4.
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|December 15, 2015
Summary
Analog systems for carbon dioxide (CO(2)) mixing experiments are less unstable than CO(2)-water systems. This study provides a scaling relation for instability onset, crucial for selecting appropriate analog systems and interpreting experimental results.
Area of Science:
- Fluid dynamics
- Geophysics
- Chemical Engineering
Background:
- Analog systems are frequently employed in experiments simulating convective mixing of carbon dioxide (CO(2)).
- Understanding the dynamics of these systems is crucial for accurate experimental interpretation and analog selection.
Purpose of the Study:
- To generalize the nonmonotonic density dependence of instability growth in analog systems.
- To establish a scaling relation for the onset of instability.
- To compare the dynamics of typical analog systems with CO(2)-water convective instabilities.
Main Methods:
- Linear stability analysis.
- Direct numerical simulations.
- Theoretical generalization of density dependence and instability onset.
Main Results:
- A scaling relation for the onset of instability was derived.
- Analog fluid systems, like water-propylene glycol, exhibit less instability compared to CO(2)-water.
- The dynamics of tested analog systems do not accurately replicate CO(2)-water convective instabilities.
Conclusions:
- Current analog systems may not be suitable for all CO(2) mixing experiments.
- Results provide a framework for selecting appropriate analog systems.
- Further research is needed to refine analog system selection for accurate CO(2) experiments.
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