Fluids

Friction Factor (Darcy)

Definition

A dimensionless number used in the Darcy-Weisbach equation to calculate pressure drop. Depends on Reynolds number and pipe relative roughness.

For laminar flow, f = 64/Re. For turbulent flow, use the Colebrook-White or Swamee-Jain equation.

Calculate pressure drop in straight pipes using the Darcy-Weisbach equation. Determine flow regime, friction factor, and head loss.