Momentum Weighted Interpolation for unsteady weakly compressible two-phase flows on unstructured meshes.

A set of strategies and numerical techniques for simulating weakly compressible two-phase flows is presented. A pressure formulation of the full Baer-Nunziato equations with arbitrary equation of state is presented. Node centered finite volumes are used on unstructured meshes in a fully implicit solver. To mitigate the pressure checkerboarding that arises from the collocated variable arrangement, a Momentum Weighted Interpo-lation formulation is derived specifically for the Baer-Nunziato equations. The proposed approach is thoroughly tested against analytic and experimental data.(c) 2023 Elsevier B.V. All rights reserved.