Quote:
Originally Posted by Phase
Is that why companies put vortex generators near the mirror if it’s closer? So it controls the bigger and more wild vortex’s between the car and mirror?
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Sometimes the very presence of the VGs alters the natural frequency of the mirror housing, eliminating some unwanted noise that couldn't be modelled in CFD, and which hadn't shown up until they got the car into an acoustic wind tunnel.
And since 'adding' the VGs is a simple 'additive' modification to the existing tooling, it costs very little for the good it does.
All VGs are 'BAND-AIDs'. If they exist at all, it's because there was something wrong with the original design. If the 'local' flow turns out to be a disappointment, there's only so much a VG would be able to mitigate.
And whatever they come up with has got to be able to stand up to a commercial car wash.