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Gábor Pótári1, Ágota Tóth1, Dezső Horváth2

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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.

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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.