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Old 01-21-2016, 07:50 PM   #3 (permalink)
ConnClark
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Quote:
Originally Posted by aerohead View Post
I ran across this online.
http://iawe.org/Proceedings/8APCWE/K.Selvakumar.pdf
*They use a 1:10-scale model
*They need a 327.86 km/h air velocity for dynamic similarity
*Their highest test velocity is 12-m/s,when they need 91.07 m/s
*No where do they mention Reynolds number.
Since they were comparing a digital model to a wind tunnel model both being 1:10 they don't need to scale the air speed.

Also since the model(both digital and wind tunnel) was pretty much a joke when it comes to representing a real car, this was more an exercise in CFD software validation.

If you want to do a real car and get results within about 5% you have to have rotating wheels and have flow through the grill taken into consideration.
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