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Water latent heat?

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Old   September 4, 2014, 08:54
Default Water latent heat?
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Hello All!

I have to do with humid air. Water vapor is supplied as Mass Source. Species and Energy Models are declared. The problem is humid air enthalpy. It doesn't include water latent heat like this (dry basis enthalpy):

h1+X=1.006t+X(2501+1.86t) [kJ/kg dry air].

Instead Fluent yields its own entalpy according to this (wet basis without latent heat):

h=(1.006t+X1.86t)/(1+X) [kJ/kg wet air].

I need answers to the following questions:
1. how to make Fluent calculate correct humid air enthalpy?
2. what is the value or temperature dependant function of water latent heat in Fluent and where can I find it and manage?

Thanks in advance.

Last edited by jacek; September 4, 2014 at 08:59. Reason: formulae error
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enthalpy, humid air, latent heat, vapor, water

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