Dear Dan,
as you describe it, your application would have to at least use a two-component (e.g. Shan-Chen or Free energy) or free surface model coupled to a particle model (e.g. HLBM).
Please consider joining the Consortium (https://www.openlb.net/consortium/) or visiting our Spring School (https://www.openlb.net/spring-school-2025/) to get extended support for this.
BR
Stephan