Axisymmetric nozzle
 

I would like to solve an incompressible flow in a converging-diverging nozzle. I try with a 2D cartesian mesh and with a 2D axisymmetric mesh and I would like to know what is the difference in results I could obtained?

For the solver, does I have to do anything saying that it is a cartesian or axisymmetric problem?

Thank you very much to help me understand the differences between these two approach.

Sylvain