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Entropic lattice boltzmann method for multiphase flows.

A Mazloomi M1, S S Chikatamarla1, I V Karlin1

  • 1Department of Mechanical and Process Engineering, ETH Zurich, 8092 Zurich, Switzerland.

Physical Review Letters
|May 16, 2015
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Summary
This summary is machine-generated.

A new lattice Boltzmann model accurately simulates two-phase fluid dynamics. This thermodynamic model captures complex phenomena like colliding droplets and stable film formation, validated by experiments.

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Area of Science:

  • Computational fluid dynamics
  • Thermodynamics
  • Multiphase flow systems

Background:

  • Simulating dynamic phenomena in two-phase fluids requires robust computational models.
  • Existing models may struggle with accurately capturing interface dynamics and complex behaviors like droplet collisions.

Purpose of the Study:

  • To develop a novel, thermodynamically consistent lattice Boltzmann model for simulating two-phase fluid dynamics.
  • To incorporate an entropic lattice Boltzmann stabilization mechanism for precise control of liquid-vapor interface dynamics.

Main Methods:

  • Development of a thermodynamically consistent lattice Boltzmann model.
  • Application of the entropic lattice Boltzmann stabilization mechanism.
  • Performing simulations of colliding droplets and associated phenomena.

Main Results:

  • The model successfully simulates dynamical effects in two-phase fluids.
  • Complex phenomena, including stable lamella film formation during droplet collisions, were observed.
  • Simulations showed excellent agreement with recent experimental data.

Conclusions:

  • The developed lattice Boltzmann model provides a viable approach for simulating complex dynamic phenomena in multiphase fluids.
  • The entropic stabilization mechanism is key to accurately controlling liquid-vapor interface dynamics.
  • This method offers a promising tool for advancing research in fluid dynamics and interfacial phenomena.