Variable pressure with height

[splitzilla]

Hello,

I want to add a load to a model where the pressure changes with height (not hydrostatic, so not linear). The function is quadratic. I can't seem to find such an option in nx advanced simulation.

Is there someone who could help me?

Thank you!

 

[splitzilla]

I forgot to say that the model is a silo filled with a bulk solid. The pressure downwards does not increase linear but degressive to a max value.