Explicit Equations for Pipe-Flow Problems

by Prabhata K. Swamee, Reader in Civ. Engrg.; Univ. of Roorkee, Roorkee (U.P.), India,
Akalank K. Jain, Sr. Research Fellow; Dept. of Civ. Engrg., Univ. of Roorkee, Roorkee (U.P.) India; formerly, Reader in Civ. Engrg., Government Coll. of Engrg. and Tech., Raipor (M.P.), India,

Serial Information: Journal of the Hydraulics Division, 1976, Vol. 102, Issue 5, Pg. 657-664

Document Type: Journal Paper


Direct solutions of pipe flow problems are not possible because of the implicit form of Colebrook-White equation which expresses the hydraulic resistancee of commercial pipes. The three basic and major problems encountered in hydraulic engineering practice are the determination of pipe diameter, the discharge and the head loss. The solution of these problems on conventional lines involves many trials and tedious computations. Some research workers have proposed graphical solutions which have their own inherent limitations. Reported herein are explicit and accurate equations for pipe diameter and head loss and a closed form solution for the discharge through the pipe, based on Colebrook-White equation. These explicit equations can also be utilized with advantage in optimization studies of pipelines and water distribution systems.

Subject Headings: Head loss (fluid mechanics) | Flow resistance | Water supply systems | Pipe flow | Engineering profession | Water discharge | Computing in civil engineering | Labor

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