turbof1 wrote:
Anybody having a clue about the reasoning behind this concept? Another solution against wing stalling? Or something else?
To be honest, I haven't had the time to decode what they were thinking, but as a general forensics method you can draw (by hand, pencil or whatever) the freestream air, along with the interaction air flows - different colors. Then spot the usual low and high pressure zones given the widespread properties of air and solid bodies, called Aerodynamics. Then, look at the shapes, consider the Kutta condition, the vortex fomations, where the air is supposed to go. Then, use your own nomenclature of predicted downforce points to spot the obvious places. Finally, do the math, look at the car as a whole and I'm sure you'll be able to come up with pretty decent answer. That's not a nuclear physics.
P.S. I know it sounds like the obvious thing to do, but that's what I can offer apart from CFD-ing the wing