concentration in a room

June 17, 2004, 04:49

Hello all

I am trying to map the concentration decay in a ventilated room by using CO2 as a tracer gas. I inject the tracer using user fortran and got values of the tracer in the room. CFX manual says the unit of the user fortran is kg/s. How can I changed it to concentration unit, say kgCO2/kg air? help is appreciated!! thanks. I use CFX 4.4

Tad

June 17, 2004, 23:47

Sources on mass fractions are in kg/s, but the actual concentration value for a mass fraction is always kg species / kg fluid (i.e. mass fraction).

Jeff

June 17, 2004, 04:49	concentration in a room	#1
Tad Guest Posts: n/a	Hello all I am trying to map the concentration decay in a ventilated room by using CO2 as a tracer gas. I inject the tracer using user fortran and got values of the tracer in the room. CFX manual says the unit of the user fortran is kg/s. How can I changed it to concentration unit, say kgCO2/kg air? help is appreciated!! thanks. I use CFX 4.4 Tad

June 17, 2004, 23:47	Re: concentration in a room	#2
Jeff Guest Posts: n/a	Sources on mass fractions are in kg/s, but the actual concentration value for a mass fraction is always kg species / kg fluid (i.e. mass fraction). Jeff

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