Swamee-Aggarwal Equation


Although an exact analytical solution of the Buckingham-Reiner equation can be obtained because it is a fourth order polynomial equation in f, due to complexity of the solution it is rarely employed. Therefore, researchers have tried to develop explicit approximations for the Buckingham-Reiner equation.

The Swamee Aggarwal equation is used to solve directly for the Darcy–Weisbach friction factor f for laminar flow of Bingham plastic fluids. It is an approximation of the implicit Buckingham-Reiner equation, but the discrepancy from experimental data is well within the accuracy of the data.

Related formulas


fLFriction loss for a laminar flow (dimensionless)
ReReynolds number (dimensionless)
HeHedstrom number (dimensionless)