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| quote: | Originally posted by DasBrotBesser
Ok, so here's something for people to think about :
You're walking down the street in Chicago when 0-degree-Fahrenheit air is moving down the street with freestream velocity of 30 mph. At each block, as the air impacts at the corner of a building, a boundary layer builds up along the side of the building, just like on a flat plate. To avoid getting too cold, you walk very close to the building, hoping to stay inside the bounday layer. At what minimum distance from the corner can you be guaranteed that boundary layer will be at least 2 feet wide? For air, density = 0.085 lb-mass/foot^3, viscosity = 0.0393 lb-mass/foot-hour.
If anyone can help, 'twould be greatly appreciated! This problem is getting on my nerves something fierce!
Sorry if that's just too much for anyone to think about this late at night, but I'm getting desperate. |
yeah, if i were semi-sober i could possibly help you out. pv=nrt seems a little simple for this...
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