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-   -   Usinf FLUENTs inbuilt function to calculate RH of Moist Air at T_dry_bulb (http://www.cfd-online.com/Forums/fluent/110794-usinf-fluents-inbuilt-function-calculate-rh-moist-air-t_dry_bulb.html)

Abhya December 21, 2012 00:41

Usinf FLUENTs inbuilt function to calculate RH of Moist Air at T_dry_bulb
 
Hey guys,
does anyone know which relation FLUENT uses to calculate the RH of moist air at a given temperature?
Also can i use the inbuilt formula/method fluent uses to calculate RH at a given temp ?

msaeedsadeghi December 21, 2012 02:36

Try more, you can find it... ;)

Abhya December 21, 2012 09:15

hey there . i found one more realtion for temperature range < 650 k (IAPWS standards) around .. however the results of RH calculation from fluent and IAPWS formulas at a given mf and temp vary too much.
Anyone can plz help .. with what exactly FLUENT does with respect to this? or where Im committing possible errors???:confused::confused::confused::confused:: confused::confused::confused:

Abhya December 22, 2012 09:25

Quote:

Originally Posted by Abhya (Post 398563)
hey there . i found one more realtion for temperature range < 650 k (IAPWS standards) around .. however the results of RH calculation from fluent and IAPWS formulas at a given mf and temp vary too much.
Anyone can plz help .. with what exactly FLUENT does with respect to this? or where Im committing possible errors???:confused::confused::confused::confused:: confused::confused::confused:

hey there found the prb ...
i was mistaking mass_fraction used by fluent as humidity ratio!
IAPWS formation matches with FLUENTS RH calc within 5% relative error (Given a temperature and mass fraction u calc RH from it).. i guess thats not bad :cool:

Any better methods suggestion here after are so so welcome
gd thnx :D:D


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