convert relative humidity to mass fraction for species transport

asal · October 2, 2015, 06:21

Hello all.

I want to have 40% humidity in my domain and for this I used species transport. Let assume that I have atmospheric pressure (101325 Pa) and 20 oc for temperature. Can anyone here kindly suggest me how can I calculate which value I need to specify for the mass fraction of H2o to my inlet to have 40% of humidity?

thanks.

amasugi14 · November 30, 2015, 00:43

Hi, I think you have to refer to the Psychrometric chart to get the water mass fraction at particular temperature and relative humidity. hope it helps.

October 2, 2015, 06:21	convert relative humidity to mass fraction for species transport	#1
asal Senior Member Astio Lamar Join Date: May 2012 Location: Pipe Posts: 186 Rep Power: 13	Hello all. I want to have 40% humidity in my domain and for this I used species transport. Let assume that I have atmospheric pressure (101325 Pa) and 20 oc for temperature. Can anyone here kindly suggest me how can I calculate which value I need to specify for the mass fraction of H2o to my inlet to have 40% of humidity? thanks.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Mass Fraction and Mole Fraction don't tie up	KieranHegarty	FLUENT	1	February 28, 2015 10:22
problems concerning mass conservativity in bubbleFoam with custom scalar transport	cutter	OpenFOAM Programming & Development	3	February 10, 2015 04:25
Problem of simulating of small droplet with radius of 2mm	liguifan	OpenFOAM Running, Solving & CFD	5	June 3, 2014 02:53
How to obtain the mass fraction of evaporated diesel spray	Mnzki	FLUENT	0	June 17, 2012 16:22
UDF for Species Mass Fraction Gradient IN SPECIFIC ZONE -- e.g. along axis of sym.	ksiegs2	Fluent UDF and Scheme Programming	0	February 27, 2011 12:55

November 30, 2015, 00:43		#2
amasugi14 New Member Join Date: Nov 2015 Posts: 5 Rep Power: 10	Hi, I think you have to refer to the Psychrometric chart to get the water mass fraction at particular temperature and relative humidity. hope it helps.