A two-phase density-based solver for simulating wet steam flows with non-equilibrium condensation. I. Approach and verification

This paper presents a new two-phase density-based solver based on the finite difference method for simulating high-speed wet steam flows with non-equilibrium condensation. The employs Eulerian–Eulerian approach to model flow using fifth-order accurate weighted compact nonlinear scheme. phase change of involves droplet growth in condensation process internally consistent classical theory. To speed up computation, tabulated equation state curvilinear grids is developed, and an improved Harten-Lax–van Leer-contact-type Riemann used compute inviscid fluxes. Furthermore, automatic differentiation technique applied avoid manually deriving complicated derivatives when computing flux Jacobian matrices thermodynamic properties. A numerical investigation conducted via various kinds nozzles blades, results demonstrate that accurately predicts behaviors observed experiments.