Usinf FLUENTs inbuilt function to calculate RH of Moist Air at T_dry_bulb

Abhya · December 21, 2012, 00:41

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:

Abhya · December 22, 2012, 09:25

Quote:

Originally Posted by Abhya

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:

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

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

December 21, 2012, 00:41	Usinf FLUENTs inbuilt function to calculate RH of Moist Air at T_dry_bulb	#1
Abhya Member Join Date: Jul 2012 Posts: 48 Rep Power: 13	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 ?

December 21, 2012, 09:15		#3
Abhya Member Join Date: Jul 2012 Posts: 48 Rep Power: 13	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:

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December 21, 2012, 02:36		#2
msaeedsadeghi Senior Member SSL Join Date: Oct 2012 Posts: 226 Rep Power: 14	Try more, you can find it...