[hameli]

Hi all,

I am simulation air rising in a pipe using starccm+. So, the pipe has outlet and all around is wall. So, I initialized the domain as attached, and then based on gravity, air moves up and bubble form. Actually, after a couple of seconds, I want to again add air to the bottom of pipe, but I really don't know how to do it. I would really appreciate your help. Just to mention that I added air at first place using user function and it is an initial condition. I mean that it is not a boundary condition, so I can make it function of time.


Thanks

[cwl]

You can read how to do that in User Guide, in Field Functions section for example.