Pierre Boivin (AMU)

Lattice-Boltzmann methods (LBM) have emerged over the past two decades as powerful and efficient tools in computational fluid dynamics, particularly for aerodynamics and aeroacoustics applications. In these contexts, flow dynamics are primarily governed by mass and momentum conservation, corresponding to acoustic and vortical modes.

Recent advances have significantly extended the scope of LBM to compressible and reactive flows through the development of multiple-distribution-function formulations, hybrid approaches, multi-speed schemes, and advanced collision operators such as regularized, multiple-relaxation-time (MRT), and entropic models.

This presentation will provide an overview of recent progress in hybrid LBM formulations, with a particular focus on reactive and highly compressible flows involving strong discontinuities. The increasing maturity of these methods will be illustrated through representative case studies inspired by hydrogen combustion and safety applications, including the prediction of hazardous thermoacoustic instabilities.