In these renderings, you can see flow lines blended with near flow field pressure to visualize how the air around the car is reacting to the changes the aero kit make.
Here is what the flow pattern over pressure distribution looks like in plane view. This is only part of the flow lines, the ones that interact with the sides of the car.
This is a rendering of pressure distribution in the near and far flow fields around the car.
This is pressure vs downforce distribution over the rear of the car, the wing and rear diffuser.
This is the pressure distribution over the rear diffuser. CFD has some limitations so it is important to correct the math model with numbers derived from physical testing on the actual car. Verus did windtunnel verification on the rear wing and used tools like coast down testing, speed vs ride height with multiple laser ride height indicators and flow visualization tools like flow paint and tuft testing to tweak the math model to get the CFD output to match the actual car. The result is perhaps the most well engineered aero kit on the market for any car!
From the data Verus was able to derive drag to speed with the wing at various angles of attack.