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Friction coefficient

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April 23, 2001, 09:41	Friction coefficient	#1
KP Guest Posts: n/a	What is / Where can i find , the friction coefficient between Air and Aluminium (at -55 degrees celsius) ?

April 23, 2001, 10:54	Re: Friction coefficient	#2
RichE Guest Posts: n/a	Reynolds number?

April 23, 2001, 16:06	Re: Friction coefficient	#3
John C. Chien Guest Posts: n/a	(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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