CFX queries

LLC91 · February 16, 2016, 13:51

Hi all,

Im trying to use CFX to do a transient simulation. i have a room with inlets that is inducing pure CO2 into the room. i would love to find out the mass fraction of the CO2 at the end of my simulation. Can anyone enlighten me with some steps? i couldnt get the mass fraction options at the results. Please help Thank you.

ghorrocks · February 16, 2016, 18:12

Have you looked at the tutorial examples? There are examples of flows similar to this.

evcelica · February 17, 2016, 07:45

The variable name will be something like: "CO2.Mass Fraction" or whatever you named your CO2 fluid: "FluidName.Mass Fraction"

LLC91 · March 3, 2016, 12:18

hi all, i believe i am supposed to insert expression in order to obtain the CO2 concentrations for transient analysis. any one knows where can i find the expressions to key in?

ghorrocks · March 3, 2016, 17:12

Erik's post gives the variable name. You might need to do a expression like volumeAve(CO2.Mass Fraction)@Domain or something like that to get the overall amount, however.

February 16, 2016, 13:51	CFX queries	#1
LLC91 New Member LLC Join Date: Feb 2016 Posts: 2 Rep Power: 0	Hi all, Im trying to use CFX to do a transient simulation. i have a room with inlets that is inducing pure CO2 into the room. i would love to find out the mass fraction of the CO2 at the end of my simulation. Can anyone enlighten me with some steps? i couldnt get the mass fraction options at the results. Please help Thank you.

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February 16, 2016, 18:12		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	Have you looked at the tutorial examples? There are examples of flows similar to this.

February 17, 2016, 07:45		#3
evcelica Senior Member Erik Join Date: Feb 2011 Location: Earth (Land portion) Posts: 1,167 Rep Power: 23	The variable name will be something like: "CO2.Mass Fraction" or whatever you named your CO2 fluid: "FluidName.Mass Fraction"

March 3, 2016, 12:18		#4
LLC91 New Member LLC Join Date: Feb 2016 Posts: 2 Rep Power: 0	hi all, i believe i am supposed to insert expression in order to obtain the CO2 concentrations for transient analysis. any one knows where can i find the expressions to key in?

March 3, 2016, 17:12		#5
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	Erik's post gives the variable name. You might need to do a expression like volumeAve(CO2.Mass Fraction)@Domain or something like that to get the overall amount, however.