Laminar flow inside a filter holder problem with convergence
 

Hello,

I am simulating the flow inside a filter holder. I use mass flow as inlet, pressure outlet as outlet , porous jump for my filter and two symmetries because i simulate the one fourth of my holder.

My flow is laminar (maximum reynolds around 320).

However when i simulate it as laminar I have the warning reverse flow in ...

When I simulate it as turbulence i have no error wanring and my simulation converge.

Do you know why can it be?

Thank you very much in advance.