Rob
Forum Moderator
No, that's correct. If you only add a species source Fluent tends to convert mass rather than adding it.
Looking at the concentration graph stop the CO2 on the inlet and see what happens, I'm wondering if the result is masked by the scale. You've got a max change of about 2 in 6,300. Altering the scale may help too.
You are navigating away from the AIS Discovery experience