hydrogen leakage in the room
 

hi every body
I am a bigginer
I try to modelling a room with a leak and dispersion of hydrogen.
1-what kind of model is useful to modeling this problem?
2-how to plot volume fraction(h2)-time in the certain points
if i not sucssesful in this project in a month later, i suiside! believe me ...
please help me ...

I take it the rest of the room contains a gas?
You need to use a single phase setup with species tracking. Look up the tutorial on "modelling species transport without reactions", "modelling species transport and gaseous combustion" on the ansys costumer portal to get some more info on species tracking.

if you are only interested in the mean concentration versus time, set up a monitor for the volume-average hydrogen concentration and write this to a file. If you are also interested in spatial evolution, set up multiple monitor points, set up a movie of contour-plots or isosurfaces, or export the whole hydrogen concentration field for post-processing in MATLAB or some other program of choice.

p.s., No matter how awesome CFD may be, it's not worth dying for ;)

thank U deer CeesH.
yes , the room is fulled with the air initially.
I interested in satial evalution for some points. species transport modelgove me mole fraction , mass fraction ,... and no thing about volume fraction but I have volume fraction gragh.:(
I mentioned that I am bigginer my friend:D
if it is possible explain setup multiple monitor point, or export the whole hydrogen concentration fields with menu, for me e.g: difine>solution>monitor ....
Do U have any simple case dimilar to my model , my friend?
thank U again.