A unified lattice Boltzmann model and application to multiphase flows
Kai H Luo1, Linlin Fei2, Geng Wang1
1Department of Mechanical Engineering, University College London, Torrington Place, London WC1E 7JE, UK.
Summary
We introduce a unified lattice Boltzmann model (ULBM) framework to integrate various collision operators, simplifying model development and comparison for fluid dynamics simulations.
Area of Science:
- Computational fluid dynamics
- Mesoscale methods
- Multiphase flow simulation
Background:
- Lattice Boltzmann Method (LBM) utilizes diverse collision operators.
- Existing operators lack a unified framework for comparison and integration.
- This hinders model development and accessibility for non-specialists.
Purpose of the Study:
- To develop a Unified Lattice Boltzmann Model (ULBM) framework.
- To seamlessly integrate multiple LBM collision operators.
- To facilitate model comparison, development, and coding.
Main Methods:
- Development of the ULBM framework.
- Integration of Bhatnagar-Gross-Krook, multiple-relaxation-time, and entropic operators.
- Demonstration using multiphase flow problems.
Main Results:
- The ULBM framework successfully integrates diverse LBM collision operators.
- It clarifies relationships between operators and simplifies model adoption.
- Demonstrated effectiveness in simulating emulsion rheology, droplet splashing, and pool boiling.
Conclusions:
- The ULBM framework enhances flexibility and accessibility of LBM.
- It promotes easier model comparison, development, and coding.
- Facilitates wider application of LBM in fluid dynamics research.
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