Need help with 3d airway mesh - reduce number of cells
 

Hi everyone, I will preface this by saying I am a biologist and very new to CFD.

I have a 3d model of some small airways from a human lung and I am hoping to try and run a CFD of airflow through it to see if any airflow measurements may be different in diseased airways, however I am having some trouble as the model contains too many cells (for the student ver of fluent).

Can anyone explain to me how to reduce the number of cells in the mesh?

Please let me know if you need any additional files or info.

Thanks!
Steve