[hazem1]

Hello,
I am new to OpenFOAM, and I want to implement this custom time dependent pressure gradient boundary condition at the inlet:

dp/dx = rho*(U/dt)*(1-Uc/U)

where:
rho, Uc are constants that are defined by the user
U is obtained from solving mass conservation

Therefore, dp/dx should be updated at every time step

How can I do that?

Thanks in advance.