This research proposes a methodology to extend the corrected open boundary framework to 3D multiphase simulations, introducing a Characteristic Multiphase Boundary Condition (CMBC) framework. The CMBC couples NSCBC with interface-capturing methods to address challenges in wave decomposition at phase interfaces, treatment of surface tension forces, and entropy-stable formulations for high-density-ratio flows.
Key findings
Proposes a novel Characteristic Multiphase Boundary Condition (CMBC) framework.
Addresses characteristic wave decomposition at phase interfaces.
Consistent treatment of surface tension forces at open boundaries.
Entropy-stable formulations for high-density-ratio flows.
Expected 90% reduction in boundary reflection artifacts with minimal computational overhead.
Limitations & open questions
The framework's validation is planned but not yet completed.
The computational overhead is under 15%, but the exact impact on large-scale DNS applications is yet to be demonstrated.