Why not both? I suspect there's opportunity to finesse the details, as with vortex generators.
In other news, I added a wickerbill to the corner of my Airstream and now the prevailing NW wind that used to blow the door open blows it shut. Aerodynamics works!
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.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
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.Because much of what is in the published literature is nonsense,
and much of what isn’t nonsense is not in the scientific literature.
-- Sabine Hossenfelder
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