For cd, I can
guess how that might work on the trailing edge of a swept-back wing (jet fighter). Instead of generating one massive vortex behind each wing tip, a bunch of 60 deg saw teeth cause multiple small vortexi all along the TE..?.
When this topic first came up, it really got me thinking that my CRV rear spoiler+wake boards should have some 60d saw teeth added..
And this morning while planning the micro-front wheel skirts, I made this
edit:
(Tape holding a crescent of coroplas).
Not smooth at all.. But, would cutting a sawtooth pattern in the TE & LE of the opening be beneficial to cd??
(With the teeth points orientated in the direction of travel of course).
Hehehe! Something like that is going to be considered a real eye-sore by my wife!!
