[ymya]

I am currently conducting a computational fluid dynamics (CFD) simulation of wet steam flow through a Sriveerakul nozzle. The following boundary conditions have been specified:
Multiphase Model Type: the built-in wet steam model
Turbulence Model: k-ω SST
Primary Inlet: Pressure inlet at 198,665 Pa, temperature at 393.15 K, and a liquid mass fraction of 0.1%
Secondary Inlet: Pressure inlet at 1,228.18 Pa, temperature at 283.15 K, and a liquid mass fraction of 0.1%
Outlet: Pressure outlet at 3,000 Pa, temperature at 283.15 K, and a liquid mass fraction of 0.0%
Spatial Discretization: second-order upwind schemes for momentum and energy
Pressure-Velocity Coupling Method: Coupled
Initialization: hybrid initialization
Mesh Type: structured
Mesh Quality: Max skewness 0.36, Min orthogonality 0.84
Refinement near critical regions (nozzle throat, shock regions, wall boundaries)
Despite using these conditions, the residuals for the liquid mass fraction have not converged. I would greatly appreciate any insights into potential reasons for this lack of convergence and suggestions on how to achieve a stable solution for the liquid mass fraction in wet steam simulations.