[sparta-users] Impose a pressure at a surface boundary changing over time

[Gianluca Di S. <gia...@gm...>]

Hello,

In my simulations, I would like to impose a value of the pressure as
boundary condition acting on a specific group of surface elements (same
value of the pressure for the whole group).
The pressure should change over time based on the solution itself, in
particular based on the flow rate crossing the surface where the pressure
is imposed.
I can calculate the varying over time pressure to be imposed using the
variable command. Then I compute and print the value of the pressure using
the stats/stats_style commands.

Now I am not sure/I do not know how to impose the value of the calculated
pressure to the group of surface elements of interest.

Is the fix emit/surf command with the subsonic option capable to
impose such condition? If yes, can you please provide an example on how to
use it? If not, what is another option?

Thank you.

Best regards,
Gianluca