Multipseudopotential interaction models for thermal lattice Boltzmann method simulations.

Area of Science:

• Computational fluid dynamics
• Thermodynamics
• Multiphase flow

Background:

• The multipseudopotential interaction (MPI) model is a computational tool for fluid dynamics.
• Existing MPI models have limitations in accurately simulating complex thermal phenomena and maintaining thermodynamic consistency.

Purpose of the Study:

• To extend the capabilities of the MPI model for advanced hydrodynamic and thermal simulations.
• To improve thermodynamic consistency and accurately model droplet evaporation and bubble nucleation.

Main Methods:

• Combined MPI with multiple-relaxation-time collision operator and surface tension modification.
• Developed a method for thermodynamic consistency by splitting the ɛ_{j} term.
• Integrated MPI with double distribution function and hybrid thermal models for thermal coupling.
• Simulated droplet evaporation and bubble nucleation using the enhanced MPI model.

Main Results:

• The enhanced MPI model accurately simulates droplet evaporation, closely following the D^{2}-law.
• MPI successfully models bubble nucleation and departure during nucleate pool boiling.
• MPI thermal models demonstrate suitability for low reduced temperature simulations.

Conclusions:

• The enhanced MPI model offers improved accuracy for hydrodynamic and thermal simulations.
• MPI is a promising approach for simulating phase change phenomena like boiling and evaporation.
• Further research is needed for MPI models in challenging low reduced temperature regimes.