Aero Brothers

modelling a Subaru WRX 2022 in preparation for CFD analysis and design of functional aerodynamic parts.

Nissan Z33 aerodynamic simulation
Simulations account for rotating wheels and moving ground, unlike stationary wind tunnels which yield less than ideal data.
Velocity contour displayed over the car's geometry shows how the due to the no-slip condition velocity at the surface follows the velocity of the object moving.
as you move out towards the edges of the wheels and at the road surface the velocity is high, the same value as the velocity of the air entering while the car's body has zero velocity relative to the air, and the wheels' centers too have the same velocity as the car's body since the have less linear velocity.