porous media/jump mass flow problem
 

Hi,

I have done a simulation with 4 porous media and also done with 4 porous jump. Mass flow in the first two porous media or jump is a positive value but next 2 porous media or jump gave me negative value. But when I brake porous media or jump into 10 pieces than the value of each peace is positive. Why is that? Why it gave me a negative value in the first place?

Thank you.