Drag coefficient simulation problem
I tried to replicate the naca 4415 simulation, (naca4415_re2x10e6.sym), and the force coefficient vs Alpha in y position (Lift) seems to be the same as the original simulation, but I can't obtain the same values in the force coefficient Drag vs Alpha plot than the original simulation. I tried three times with the same results, starting with downloading and importing to Caedium the Naca 4415.brp file, using the same values from the original simulation, scalar and vector fields, scalar and vector variables, solver parameters, same physics, etc. The Drag vs Alpha plot show different values than the original. I want to replicate first this simulation before trying caedium in the airfoil I want to use in my glider proyect.
Is any tip or any missing step that can't be watched in the original simulation, to make my simulations work?
The Drag coefficient vs Alpha plot have negative values for drag coefficient.This means that the direction of drag force is reversed, or I am missing something?