Pseudopotential MRT lattice Boltzmann model for cavitation bubble collapse with high density ratio

TL;DR

This paper develops an improved pseudopotential MRT lattice Boltzmann model to accurately simulate cavitation bubble collapse with high density ratios, validated against experiments and other numerical methods.

Contribution

The paper introduces a modified forcing scheme for the pseudopotential MRT lattice Boltzmann model, enhancing its ability to simulate cavitation bubble dynamics with high density ratios.

Findings

Model accurately describes cavitation bubble development and inception.

Simulation results align with experimental and other numerical data.

The model demonstrates efficiency and reliability for bubble collapse studies.

Abstract

The dynamics of the cavitation bubble collapse is a fundamental issue for the bubble collapse application and prevention. In present work, the modified forcing scheme for the pseudopotential multi-relaxation-time lattice Boltzmann model developed by Li Q. et al. is adopted to develop a cavitation bubble collapse model. In the respects of coexistence curves and Laplace law verification, the improved pseudopotential multi-relaxation-time lattice Boltzmann model is investigated. The independence between the kinematic viscosity and the thermodynamic consistency, surface tension is founded. By homogeneous and heterogeneous cavitation simulation, the capability of the present model to describe the cavitation bubble development as well as the cavitation inception is verified. The bubble collapse between two parallel walls is simulated. The dynamic process of collapsing bubble is consistent with the results from experiments and simulations by other numerical method. It is demonstrated that the present pseudopotential multi-relaxation-time lattice Boltzmann model is available and efficient, and the lattice Boltzmann method is an alternative tool for collapsing bubble modeling.