Calcolatrice Caduta di Pressione Gratuita

Calcola la caduta di pressione per attrito in un tubo.

m
mm
m/s
kg/m^3

Pressure Drop

39.1 kPa

Equivalent Head Loss3.98 m

Pressure Drop vs Friction Factor (f)

Vedi formula →

Formula

## Pressure Drop in Pipes Pressure drop is the energy lost to friction as fluid flows through a pipe. ### Formula **delta_P = f (L/D) (0.5 rho V^2)** This is the Darcy-Weisbach equation expressed in pressure units (Pa) rather than head (m). The two forms are related by delta_P = rho g h_f.

Esempio Risolto

Water at 2.5 m/s through 80 mm pipe, 50 m long, f = 0.02.

  1. 01D = 0.08 m, L/D = 50/0.08 = 625
  2. 02Dynamic pressure = 0.5 x 1000 x 2.5^2 = 3125 Pa
  3. 03delta_P = 0.02 x 625 x 3125 = 39,063 Pa = 39.1 kPa
  4. 04Head loss = 39,063 / (1000 x 9.81) = 3.98 m