Lattice-Boltzmann modeling of dissolution phenomena

Area of Science:

• Computational fluid dynamics
• Materials science
• Chemical engineering

Background:

• Simulating dissolution phenomena is crucial for understanding material degradation and transport processes.
• Existing models often struggle with complex geometries and reactive flow conditions.

Purpose of the Study:

• To develop and validate a lattice-Boltzmann model for simulating complex dissolution phenomena.
• To introduce novel boundary conditions for fixed concentration and surface flux in multicomponent systems.
• To extend the model's applicability to intricate solid structures using a volume-of-fluid approach.

Main Methods:

• Implementation of a lattice-Boltzmann method.
• Design of specific boundary conditions for concentration and flux.
• Integration with a volume-of-fluid technique for solid structure representation.
• Validation against benchmark problems with known analytical solutions.

Main Results:

• The lattice-Boltzmann model successfully simulates complex dissolution.
• The proposed boundary conditions are effective for multicomponent reactive flow.
• The combined approach accurately models dissolution involving complex solid structures.
• Validation shows good agreement between model predictions and analytical solutions.

Conclusions:

• The developed lattice-Boltzmann model provides a robust tool for simulating complex dissolution.
• The novel boundary conditions enhance the model's versatility for reactive flow studies.
• This work advances the simulation capabilities for phenomena in porous media and complex geometries.