Dryness Fraction - Do All Steam Have It?

[freshbox]

Do all steam have dryness fraction or only wet steam?


Thanks.

 

[sanka]

Saturated water (water at boiling point) has a dryness fraction = 0
Wet steam has a dryness fraction anywhere between 0 - 1
Dry saturated steam has a dryness fraction of 1
Superheated steam (steam at a higher temperature for its saturation pressure) has a dryness fraction of 1