Hi, Is there a possibility in FLUENT to handle superheat steam? if yes, how does it calculate different states along a expnasion line of a turbine.Thanks

you can treat super heated steam as ideal gas. if not so please tell me why?

Why don't you use the properties that are available with the non-equilbrium steam condensation model? I think these are based on a real equation of state for steam.

[hadial]

hello my dear friends I want to use super heated steam in fluent as working fluid in a channel, how is it possible, i really need someone to help me

[LuckyTran]

Originally Posted by hadial

hello my dear friends I want to use super heated steam in fluent as working fluid in a channel, how is it possible, i really need someone to help me

You simply need an equation of state or a sufficiently detailed property table.

Fluent supports refprop (a NIST database) which has superheated steam. You simply need to activate it through the TUI. It's very easy to use. Refprop uses a Helmholtz equation of state, a true multi-parameter equation of state, and in my opinion is the most accurate generalized database available beyond localized measurements.

[hadial]

thank you LuckyTran for your prompt response:

I activated it by using :
define/user-defined/real-gas/nist-real-gas-model
then I choose "water.fld" in order to activate this for super heated steam, but the result i get is absurd
what about using water vapor in fluent data base? it won't be useful?

[LuckyTran]

Originally Posted by hadial

what about using water vapor in fluent data base? it won't be useful?

Up to you whether you find any use in it or not. The database has constant properties and specific heat as a polynomial of temperature. This is fairly limiting but enough to do a lot of things, it depends on what you are trying to accomplish. Sometimes you do want to fix and keep certain properties constant to simplify other analysis.