Reply To: Fluent Piecewise-polynomial coefficeint of cp for water vapor

[Rob]

They're probably accurate, as is all of the materials database but you need to check it's appropriate for your model: pressure isn't mentioned in most cases. Some of the material data has references, however much of it does not as the values were added at various times over the last 40 years. 

It's an area we're looking into with the (formerly) Granta team but that's focussed on solid properties at present.