saturated fluid

A substance at vapor-liquid equilibrium is generally referred to as a saturated fluid.

Normal flow, in which water is injected into the well tubing and the saturated fluid is produced through the annulus between the tubing and the casing.

The notion of "saturated fluid" includes saturated liquid (about to vaporize), saturated liquid-vapor mixture, and saturated vapor (about to condense).

Nucleate boiling is a type of boiling that takes place when the surface temperature is hotter than the saturated fluid temperature by a certain amount but where the heat flux is below the critical heat flux.