Originally posted by Barramut
The diffuser vertical blades are not parallel.
It seems to be projected to move the air in diagonal, so that the air has room to expand not only in the vertical axl, but also in the horizontal and create more downforce.
Does it speed up the air more and create downforce [Bernouly effect],
or
Downforce is created bcs the air expands and creates a low pressure zone that sucks the back of the car towards the ground?
Basically a diffuser, in combination with the floor, creates downforce.
As the air passes under the front of the floor it accelerates and reduces pressure, the suction peak is at the transition of the floor and diffuser where the diffuser changes the high velocity air back to normal velocity, and low pressure air back to the ambient atmospheric pressure, making the whole underbody a downforce producing device.
It does use
Bernoulli's principle, such that the pressure increases while the velocity decreases. Since the pressure below the car is lower than on the side and above the car, you get downforce.
Oh and Martin Whitmarsh is actually a really nice guy, not that I expect you guys not to tear him apart regardless.