[Turhan]

Hi all,

I have a semi submerged pipe inside water. It has two outlets, one is inside the water and has hydrostatic pressure and the other one is outside the water and has atmospheric pressure. I calculated these values and filled them in as fixedValues in the boundary conditions.

When simulating this as pure fluid I have no issue and the simulation looks correct.
However, when I add particles through DPMFoam the velocity seems to have jumps, which is caused by the pressure having big jumps in its value.

I was wondering what effects particles add (such as higher density, additional friction losses, etc) that I need to take into consideration when determining the boundary conditions. And why is my simulation not correct anymore? The hydrostatic pressure outside the pipe does not change after all, so should I really be changing the boundary condition?