This section describes the equations employed by pfcalc (pipe friction calculator) to compute pressure drop in piping systems. For a description of the program and it's GUI front-ends and for download locations see the pfcalc home page.
The program operates on an arbitrary number of pipes. For each pipe, the following equations are solved:
Note that the Colebrook-White equation (formula 3 for Reynolds numbers larger than 4000) is an implicit equation and is solved by an iterative method.
This page was last updated on 23/11/2012.