Relative humidity approach
I have patched the whole volume with with constant relative humidity 30% by giving mass fraction for h20 by selecting h20+ air in species transport and temperature 303k. I am giving the air flowing through the mouth 100% humidity and body temperature. And my fan velocity is zero with zero mass fraction and temperature 293k (or I have to give 303k temperature?).
After initialization the whole domain is 30% humidity but after calculation by running for some time the humidity is changed ,
Is that change due to mouth air ? Is my approach right to give constant ambient temperature and constant relative humidity.
I am confused in this matter.
Kindly help me