If a dryness fraction is 0.95, what does that imply?

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Multiple Choice

If a dryness fraction is 0.95, what does that imply?

Dryness fraction is the mass fraction of vapor in a two-phase mixture of liquid water and steam. It is defined as x = m_vapor / (m_vapor + m_liquid). If x is 0.95, that means 95% of the total mass is in the vapor phase and 5% remains as liquid. So the sample is mostly vapor but not completely dry. It would be completely dry only if x = 1, and it would be purely liquid only if x = 0. Also, dryness fraction refers to mass, not volume, so it doesn’t imply 95% of the volume is vapor.

Dryness fraction is the mass fraction of vapor in a two-phase mixture of liquid water and steam. It is defined as x = m_vapor / (m_vapor + m_liquid). If x is 0.95, that means 95% of the total mass is in the vapor phase and 5% remains as liquid. So the sample is mostly vapor but not completely dry. It would be completely dry only if x = 1, and it would be purely liquid only if x = 0. Also, dryness fraction refers to mass, not volume, so it doesn’t imply 95% of the volume is vapor.

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