Quote:
Originally Posted by freebeard
This one?
It looks like the dimples recess the fastener and are tapered out to minimize their influence.
An airdam and spoiler can interact with each other (Porsche) and they're on opposite ends of the car. The airdam/diverter, wheelwells, bellypan and diffuser all act together. Airflow is segregated by fences, not dimples. "...the reynolds numbers" is actually Reynolds number[singular], a dimensionless quantity.
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Thats the one. I understand what you're saying, but can't see why audi would come up with such a dramatic way to hide a fastener if they didn't want it to serve a dual purpose. Back to the fence thing, canards in motorsport produce a vortex that helps keep airflow separated along the side of the car, I don't see why a similar idea can't be applied underneath. Are these just not shaped the right way? Would you want the teardrop pointed the other direction to produce a vortex? Here's Mercedes's similar application