Wet Steam - Specific Volume

The droplets of water in wet steam occupies negligible space in the steam and the specific volume of wet steam will be reduced according the dryness fraction:

v = v_s ζ                            (1)

where

v= specific volume of wet steam (m³/kg, ft³/lb)

v_s= specific volume of the dry steam (m³/kg, ft³/lb)

ζ  = dryness fraction