Ethanol at 208C fl ows at 125 U.S. gal/min through a horizontal cast iron pipe with L 5
Chapter 6, Problem p6.50(choose chapter or problem)
Ethanol at 208C fl ows at 125 U.S. gal/min through a horizontal cast iron pipe with L 5 12 m and d 5 5 cm. Neglecting entrance effects, estimate (a) the pressure gradient dp/dx, (b) the wall shear stress w, and (c) the percentage reduction in friction factor if the pipe walls are polished to a smooth surface.
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