Pipe Flow/Friction Factor Calculations using Excel ...
pipe Flow/Friction Factor Calculations using Excel Spreadsheets Harlan H. Bengtson, PE, PhD Emeritus Professor of Civil Engineering Southern Illinois University Edwardsville Table of Contents Introduction Section 1 The Basic Equations Section 2 Laminar and Turbulent Flow in Pipes Section 3 Fully Developed Flow and the Entrance Region Section 4 Obtaining friction Factor Values Section 5 calculation of Frictional Head Loss and/or Frictional Pressure Drop Section 6 A Spreadsheet for calculation of pipe Flow Rate Section 7 A Spreadsheet for calculation of Required pipe Diameter Summary References Introduction The Darcy-Weisbach equation or the Fanning equation and the friction Factor (Moody friction Factor or Fanning friction Factor ) are used for a variety of pressure pipe flow Calculations .
A common form of the Fanning equation (including minor losses and with uniform pipe diameter and reference velocity for Ks) is: Like the Darcy-Weisbach equation, the Fanning equation is also a semi-empirical, dimensionally consistent equation. The parameters D, V, K, and L are the same as in the Darcy-Weisbach equation just described above.
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