[Gkchpa]

Hi everyone I am simulating Automotive cooling fan (CFD) which will proceed to aeroacoustic prediction. I am a little bit confused giving boundary conditions Inlet velocity - mass flowrate
outlet -pressure
as it is a cooling fan there is delta pressure resulted by the radiator, how to add it into the simulation in Ansys Fluent any suggestion


Thank you

Best regards

[tas38]

For such a simulation, you could specify the total pressure at the inlet and the static pressure at the outlet. With relatively low speed air flow, the dynamic pressure component will be comparatively small and the static pressure drop will be nearly the same as the difference between the inlet total pressure and the outlet static pressure.

Alternatively, you could specify the mass flow at the inlet. The initial value would only be approximate but could then be adjusted until the desired pressure drop is achieved.

[Gkchpa]

thank you for the reply, what if I take Massflowrate as the outlet Boundary condition and inlet some velocity, any suggestion in this case, Is it sensible to give both Massflowrate and pressure as BC ?