Unstructured Flux-Limiter Convective Schemes for Simulation of Transport Phenomena in Two-Phase Flows

Unstructured flux-limiters convective schemes designed in the framework of the unstructured conservative level-set (UCLS) method, are assessed for transport phenomena in two-phase flows. Transport equations are discretized by the finite volume method on 3D collocated unstructured meshes. The central difference scheme discretizes the diffusive term. Gradients are evaluated by the weighted least-squares method. The fractional-step projection method solves the pressure-velocity coupling in momentum equations. Numerical findings about the effect of flux limiters on the control of numerical diffusion and improvement of numerical stability in DNS of two-phase flows are reported.