[lollouc19]

Hi everyone,
I am here to ask about a 2D simulation carried out on Ansys Workbench. The analysis consists of two Selig airfoils (in a downforce-generating configuration) with a certain gap and overlap between them; the bundary conditions are velocity-inlet for the inlet, pressure-outlet for the outlet, and then symmetry for the top and bottom walls.
Running the analysis on Fluent, I get negative drag for the first airfoil (-6N) and positive drag for the second (12N). Downforce is correct. How is this possible?
This happens using both k-epsilon and k-omega turbulence models.

Thanks for the help!