Fluent vs COMSOL
 

.)Ansys Fluent Student version
.)Pressure inlet Pressure outlet boundary condition
.)Long 8cm channel with 130 micron diameter with 4 inlet and two outlet at each end. Inlet pressure of 1atm and outlet pressure of 0atm.
.)Argon working fluid
.) Pressure based solver

Image 1 is a result obtained in comsol and it is from a published scientific paper. it has a geometry very close to the one on which I am making an simulation in ansys fluent.

doesn't matter what I do I am unable to create the small peaks in density that are near the inlets. I can't understand where i am going wrong.

Thank you for your help!