converting volumetric flow in to velocity for porous media Fluent
 

Hello , I am simulating cooling fan , I would like to setup porous media in front of the fan as replica of radiator, As I have experimental data i.e volumetric flow vs delta pressure , in the Darcy's equation or some other Ansys tutorials it is calculated using velocity Vs deltapressure , I am little confused how to convert volumetric flow into velocity to get viscous & inertia resistance coefficients


Thank you