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freebeard · 01-01-2020, 11:09 PM

If it's a wedge that's widest at the front, consider more of a bullet shape with a leading edge fillet to promote re-attachment with some taper leading to a boxed cavity.

I'm not sure about surface roughness. I believe dirt and duct tape don't have much effect, it would involve Reynolds number. 'Attached turbulent flow' is a term aerohead has used.

01-01-2020, 11:09 PM	#6 (permalink)
freebeard Master EcoModder Join Date: Aug 2012 Location: northwest of normal Posts: 28,992 Thanks: 8,226 Thanked 9,000 Times in 7,434 Posts	If it's a wedge that's widest at the front, consider more of a bullet shape with a leading edge fillet to promote re-attachment with some taper leading to a boxed cavity. I'm not sure about surface roughness. I believe dirt and duct tape don't have much effect, it would involve Reynolds number. 'Attached turbulent flow' is a term aerohead has used. __________________ . .Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster ________________ . .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