Hybrid lattice Boltzmann method for multiphase flows
Thomas Gregorczyk1, Song Zhao1, Pierre Boivin1
1M2P2, Centrale Med, CNRS, Aix Marseille Univ, Marseille, France.
Physical Review. E
|September 16, 2025
Summary
A new hybrid method combines lattice Boltzmann and finite volume schemes for multiphase flow simulation. This approach accurately models fluid behavior, including complex liquid jet breakup phenomena.
Area of Science:
- Computational fluid dynamics
- Multiphase flow simulation
- Numerical methods
Background:
- Accurate simulation of multiphase flows is crucial in various engineering applications.
- Existing methods often face challenges in capturing complex interface dynamics and phase transitions.
- A unified approach for mass, momentum, and phase field evolution is needed.
Purpose of the Study:
- To introduce a novel hybrid numerical method for simulating multiphase flows.
- To couple a lattice Boltzmann method (LBM) with a finite volume scheme (FVS).
- To validate the proposed method for diverse flow regimes.
Main Methods:
- A hybrid approach solving mean mass and momentum using LBM.
- An order parameter (phase indicator) solved by a classical FVS.
- LBM scheme adapted with equilibrium formulation and macroscopic reconstructions.
- Analytical consistency confirmation and validation on canonical cases.
Main Results:
- The hybrid scheme demonstrates analytical consistency.
- Successful simulation of 2D liquid jet breakup across various regimes.
- Observed phenomena include dripping, sinuous breakup, and atomization.
Conclusions:
- The hybrid LBM-FVS method is a robust tool for multiphase flow simulation.
- The approach accurately captures complex interface dynamics and breakup mechanisms.
- This method offers a promising avenue for advanced fluid dynamics research.
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