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April 23, 2001, 08:41
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Friction coefficient
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Guest
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What is / Where can i find , the friction coefficient between Air and Aluminium (at -55 degrees celsius) ?
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April 23, 2001, 09:54
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Re: Friction coefficient
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#2 |
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Reynolds number?
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April 23, 2001, 15:06
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Re: Friction coefficient
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#3 |
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(1). The book "boundary layer theory" by Schlichting has a formula: cf=0.074*(Re)^-0.2; 500000 .gt. (Re) .lt. 10000000., where Re is the Reynolds number based on the length. (2). At Re=10000000, cf=0.003 roughly. see the book for other numbers.
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