probleme with mass conservation
hi, every one
My problem is a two-dimensional double diffusion problemin square cavity. there is a temperature difference and a concentration difference between vertical walls, and the horizontal wall is adiabatic and impermeable.
i tried to simulate my problem:
- i checked the report flux for the total mass rate i`am surprised because it displayed zero on vertical walls while i imposed mass fraction !!!
i calculated the sherwood number for the right and left walls and i didn`t had a conservation
for the mixture i used(air+h2o vapor) with imposed physical properties
thanks
Comments
1/Where did you check that mass rate report?
2/What do you want to do? Add some screenshots of your case and model/bc settings.
thnak you Dr Amine for anwsering,
the cavity is failed with a mixture of air+13% H2O vapor. The horizontal walls are adiabatics and impermeables, the verticals ones have imposed temperatures and mass fractions.
Th: hot temperature
Yh: hight mass fraction of H2O vapor
Tc:cold temperature
Yc:low mass fraction of H2O vapor.
for the mixture i imposed physical properties, with mass diffusivity coef.
after runing my case, i checked the conservation mass flux on vertical walls (by report) and it displayed me zero
i do the same thing with heat flux and it display the conservation!!! where is the problem
is it mass flux of H2O, or mixture?
hi,yasser selima thnaks for reply
it is a H2O flux
This is strange!!
Try decreasing Yc and increasing Yh and see what get!
Also plot contours of H2O volume fraction and see how it is distributed in the room. May be we can see something
What do you want to do? To add Species through walls?