pressure boundary condition
 

Hi All

Is it possible to set all the boundary conditions, "pressure outlet"?
this is to create a vacuum in a pipe with a stationary fluid inside ..

hi,
without an inlet ..its not possible to define an outlet.

so not possible to define all the boundaries as outlets.

thanks for reply,
the idea is to apply an aspiration in a domain which is initially still (no fluid movement before applying the aspiration force), and after applying the aspiration force the fluid should move from inlets to the aspiration boundary (aspiration boundary = minus static pressure or minus pressure outlet)
do you think i have to impose inlet pressure at inlets,

p.s. i imposed pressure outlet on every boundary, it actually works but the results is not correct to me ..