Study of significance of friction factor in pipe design

The present study deals with the determination of value of friction factor (f) using the explicit and implicit form of equation in the fluid flow mainly in the turbulent flow regime. A computer programming has been developed to determine the friction factor value of the Colebrook white equation which is in the implicit form. The aim is to reduce the friction factor value by taking into account the fluid properties and the material of construction. The friction factor has also been calculated by using other empirical equations for different Reynolds number and the comparison study has been done for the same. It has been observed that in case of galvanized iron the Cole brook equation has the lowest value of friction factor for the higher value of Re. In case of steel Colebrook has the lower value of friction factor in the lower region of Re where as in case of cast iron, Haaland equation has lower value of friction factor for higher range of Re. The effect of friction factor has also been studied with varying Re for different surface roughness (ε/D).