[qingnian]

Dear all,

I have a cylinder model, The upper top surface is the pressure inlet 2500Pa, and the lower bottom surface is the pressure outlet 0Pa.
There are some particles in the container, which is used to calculated for the pressure drop in the container.
But I found that at some point, the pressure in the middle position of the container will exceed the boundary conditions set by the pressure boundary (such as larger than 2500Pa, pressure at some time is 2700Pa, some thing like that).
The Fluent DDPM model was used to do the simulation.

Can anyone explain what could be the reason for this problem, or how can i fix it?


thanks！ Cheers！