Pressure inlet boundary condition
 

Hello,
I want to translate the pressure-inlet boundary condition that I am using on Fluent to another CFD solver. I have the following options
The Dirichlet boundary condition.
Neumann boundary condition.
Which would be most suitable in this case?

Any help will be appreciated.

Thanks

Applying a pressure value on a boundary is a Dirichlet type in pressure. But make sure this is a Dirichlet for pressure (and not velocity).


Dirichlet means you fix the value. Neumann means you fix the gradient.

Pressure Condition
 

As mentioned, it is Dirichlet. However, there is no conservation equation for pressure, hence, pressure value is not directly applied at the boundary. It is used to determine a velocity and that is applied. Pressure value is used only as a reference to adjust the pressure-field in the rest of the domain.