17 / 2025-03-26 13:44:32

Hybrid Recursive Regularized LBM and its application on multi-component shock-accelerated flows

multi-component flows; shock wave; lattice Boltzmann method;

The hybrid recursive regularized lattice Boltzmann model (HRR-LB) has demonstrated significant success in simulating single-component compressible flows [1-5]. Within the HRR-LB framework, the classical streaming-collision process is implemented on a nearest-neighbor lattice stencil (e.g., D2Q9, D3Q19) to solve the discrete velocity Boltzmann equation while preserving the intrinsic advantages of the lattice Boltzmann method. Additionally, the energy conservation equation is solved using a finite volume method. The model has exhibited exceptional performance across a wide range of compressible flow regimes, from subsonic to supersonic, underscoring its potential for extension to multi-component shock-accelerated flow simulations.



Multi-component shock-accelerated flows play a crucial role in understanding complex physical phenomena across various fields, including inertial confinement fusion, aerospace propulsion, and astrophysics. To further enhance the applicability of the lattice Boltzmann method (LBM) for simulating compressible multi-component shock-accelerated flows, this study introduces a hybrid lattice model within the HRR-LB framework. Benchmark numerical tests validate the robustness and accuracy of the proposed model in capturing intricate flow dynamics, particularly in shock-bubble interaction scenarios.