Underbody

Placeholder page for underbody aerodynamics

Things that are worth writing about here are probably:

simple expansion based diffusers complex three dimensional diffuser flow vortex flat plate interactions

Willem Toet's article on diffusers is probably the best place to start learning about diffuser design.

Keep in mind, while many teams know how to design a "good" undertray, many are plauged by insufficient stiffness (both mounting and tray itself) and too low ride height to work effectively. A bumpy track can also play a significant role - consider, if your undertray is 0.5in above the ground, if the asphalt variations are not a significant % variation.