# Swamee-Aggarwal Equation

## Description

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## Variables

f_{L} | Friction loss for a laminar flow (dimensionless) |

Re | Reynolds number (dimensionless) |

He | Hedstrom number (dimensionless) |