Question about boundaryCondition.addPressureBoundary for to observe the rarefaction effects

Palabos General
#1

Hello community,

I am writing a condition boundary on a periodic system whose source is an external force, to see the effects of rarefaction.

I could see these effects in a system that simulates a pressure gradient but obviously it is not periodic. Now, I would like to see this effect in a periodic system.

The effect of the external force only affects the velocity profiles, and for that reason I take this line into account

boundaryCondition.addPressureBoundary0N

but I need the boundary condition not to increase the pressure but to decrease it,

Is there an equivalent in PaLaBos?

boundaryCondition.subtractPressureBoundary0N

Thanks for your comments community,

#2

Hi,

what you can do is continuously modify the pressure with setDensity on the nodes where you want a varying density. Not sure that’s exactly what you want to do though.