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Precipitation patterns driven by gravity current.
Gábor Pótári1, Ágota Tóth1, Dezső Horváth2
1Department of Physical Chemistry and Materials Science, University of Szeged, Rerrich Béla tér 1., Szeged H-6720, Hungary.
Chaos (Woodbury, N.Y.)
|August 3, 2019
Summary
This study numerically investigates fluid dynamics in precipitation reactions. We identify three zones influencing product formation and derive a scaling law for gravity currents, crucial for understanding particle distribution.
Area of Science:
- Fluid dynamics
- Chemical engineering
- Materials science
Background:
- Precipitation reactions are influenced by fluid flow patterns.
- Gravity currents drive product formation in reacting fluids.
- Understanding flow is key to controlling product distribution.
Purpose of the Study:
- To numerically characterize gravity-driven flow in precipitation reactions.
- To identify zones where transport and reaction processes couple.
- To determine a scaling law for Rayleigh-Taylor instability.
Main Methods:
- Numerical simulation of fluid dynamics.
- Analysis of transport processes (advection, diffusion).
- Investigation of reaction kinetics and nucleation.
Main Results:
- Three distinct zones of coupled transport and reaction were identified.
- A scaling law for the gravity current tip region was determined.
- Flow patterns significantly influence spatial distribution of precipitates.
Conclusions:
- The flow pattern is critical for controlling precipitate spatial distribution.
- Understanding these flow dynamics aids in optimizing precipitation processes.
- The identified zones and scaling law provide predictive capabilities.
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