Mass and species sources

acalado · July 22, 2019, 18:09

Hi gents,

say I am working with a 2 species mixture (A+B). If I specify a mass source of 1 kg/s, and specify that species source A is 2 kg/s, does this mean that CFX will calculate that (due to mass conservation), the species source for B will be -1 kg/s? It is my understanding that Fluent works like this, wanted to make sure CFX does too.

Thanks in advance for your help!

evcelica · July 23, 2019, 17:13

That is a weird thing to want to do. I thought is asks for the total source, and the mass of volume fraction, not allowing this improper input. Why not run a simple test case yourself to find out this oddity.

July 22, 2019, 18:09	Mass and species sources	#1
acalado Senior Member André Join Date: Mar 2016 Posts: 133 Rep Power: 10	Hi gents, say I am working with a 2 species mixture (A+B). If I specify a mass source of 1 kg/s, and specify that species source A is 2 kg/s, does this mean that CFX will calculate that (due to mass conservation), the species source for B will be -1 kg/s? It is my understanding that Fluent works like this, wanted to make sure CFX does too. Thanks in advance for your help! __________________ Sapere aude!

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July 23, 2019, 17:13		#2
evcelica Senior Member Erik Join Date: Feb 2011 Location: Earth (Land portion) Posts: 1,188 Rep Power: 23	That is a weird thing to want to do. I thought is asks for the total source, and the mass of volume fraction, not allowing this improper input. Why not run a simple test case yourself to find out this oddity.