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Old 01-26-2010, 07:13 PM   #35 (permalink)
Bicycle Bob
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Join Date: May 2008
Location: N. Saskatchewan, CA
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Appliance White - '93 Geo Metro 4-Dr. Auto
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Looking good. Nice to see somebody else is hardy enough for winter work. I'd just like to correct the usage of the term "laminar." That is flow in which the air just distorts smoothly, with each bit maintaining its distance from the surface. It usually extends from the front stagnation point to the first scratch or change in contour. To maintain it back as far as the mid-point on a shape at our regular speeds, you need a single, perfect contour and no blemishes.
The concern about the gap mentioned here is to maintain Attached flow. In general, minor roughness aids this by thickening the turbulent boundary layer, although a bad contour can initiate separation where it is close to coming off anyway.
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