Fluid Dynamics & Pipe Flow Calculator

Formula

Q = A \cdot v, \quad \text{Re} = \frac{\rho v D}{\mu}, \quad \Delta p = f \frac{L}{D} \frac{\rho v^2}{2}

Continuity equation, Reynolds number regime classification, and Darcy-Weisbach dynamic pressure loss.

Assumptions

• · Incompressible fluid flow with constant physical properties (density ρ, dynamic viscosity μ)
• · Laminar regime Re < 2300 (f = 64/Re), turbulent regime Re > 4000 (Colebrook/Haaland)