Time-dependent BC's
 

Hello,

I have a small problem with time dependent boundary conditions.
I would like to solve rotor-stator problem (periodic subsection). How to obtain change of rotational speed with time? For example: for 0-10 second rotational speed 1000 rpm, for 10-20 s rotational speed 20 000 rpm. I have the same problem with pressure in inlet boundary condition. How to simulate sudden pressure jump in inlet (for example after 5. second)?
I would be grateful for all suggestions.

Regards,
doodek

Use a CEL expression to define the rotational speed or pressure as functions of time. You can either use a 1D interpolation function or CEL functions. V12 or earlier you have to use the step() function, V13 you can use if/then statements.