Initially sub-cooled liquid flashing flow CFD modeling: closure parameters for a non-symmetric interfacial area density formulation

A bubble to droplet transition non-symmetric interfacial area density formulation was developed for flash boiling nozzles CFD modeling. This is used in a two fluid Euler- Euler modeling with thermal phase change model. The regime based on the number of bubbles and values. first affects mainly flow close nozzle throat second parameter outlet. physical factors affecting calibration values these parameters are analyzed this paper aim defining appropriate closure models. analysis done using experimental data available literature. comparison mass rate outlet velocity. It appears that related inlet sub -cooling conditions droplets affected by pressure Reynolds number.