Half laminar and turbulent model trying to solve

Andrew Clarke

Hi there. I am currently dealing with a problem where the fluid flows into a radial gap (laminar flow here - part one) and exits into an axial channel in turbulent conditions (part two).

I have tried solving the full model using K epsilon realizable but the results do not make sence.

I then tried to create the first part of the model in laminar (result on laminar part good) and then created the second part as turbulent using inlet velocity values here from velocities at the outlet of the first part (this is when results go crazy)... can this be done?

If not, is it possible in fluent to solve one half of the model in laminar and the second half in turbulent? Or is there a better solver that can be used for these radial jets entering the turbulent region?

Any suggestions at all on this would be gold to me... many thanks for your time reading this...