Hi Danica,

Thanks for your reply! I actually don't want the flow to develop any further, because I used Ultrasound Doppler to measure the velocity at the inlet, so I want to prescribe this measured velocity at the correct point (right at the beginning of the region of interest). I understand that I can't prescribe both inlet pressure and inlet velocity, that's why I was thinking about excluding the extension in the simulation, but only using it to transfer the inlet pressure to the solid domain. However, I then need a way to prescribe the inlet pressure to the extension, but I don't know how.

I'm using the Carreau model for the viscosity.