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A dual-time central difference finite volume scheme for interface capturing on unstructured meshes

Numerical simulations of flows with a moving interface separating two immiscible fluids (often water and air) are complex. Example applications include flow through rivers and aqueducts, ships, submerged bodies, oil platforms and buoys. Paper describes central difference formulation with added dissipation that had not previously been reported for interface capturing. It adapts computational method from aerodynamics to model free-surface flows. This means that existing software tools can be modified and existing pre- and post-processing capability can still be exploited. Technology was implemented within BAE Systems code SOLAR [contact: Director, Zenotech] and led to first-author Gough's PhD award.