An alternative to the traditional friction factor for pipe flow is presented (φ = [R]f). For incompressible flows, the correlation of this new friction factor with Reynolds Number [R] and Relative Roughness [ε] is presented graphically, and appears much simpler and more intuitive than the Moody Diagram (or other equivalents). Moreover, relatively simple curve-fit formulas for representing φ explicitly as a function of R and ε are presented for various flow regimes, along with measures of error associated with these approximate formulas.
Volume Subject Area:
Fluids Engineering
1.
White, F., 2003, “Fluid Mechanics,” 5th ed., McGraw-Hill.
2.
Rouse, H., 1946, “Elementary Mechanics of Fluids,” John Wiley and Sons.
3.
Moody
L.
1944
, “Friction Factors for Pipe Flow
,” Trans. ASME
, 66
: 671
671
.4.
EES, 1992-2005, v7.450, f-chart Software, Box 44042, Madison, WI 53744 (www.fchart.com)
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