Weber Number

Compare inertia against surface tension to assess breakup and deformation.

visual calculatorMultiphase Flow

Read the flow shape before trusting the number.

This page turns a CFD setup into regime, scale, and dominant-effect cues. Adjust the calculator below and compare the moving graphic with the computed result.

input scale

model

check

Weberdroplet breakupsurface tension

formula

KaTeX rendered

\begin{aligned}\text{We = rho U\^{}2 L / sigma}\end{aligned}

ASCII source

We = rho U^2 L / sigma

rho (kg/m^3)U (m/s)L (m)sigma (N/m)

1388.8889

regime

breakup likely

Droplet and jet breakup thresholds depend on geometry, but larger Weber number almost always means stronger inertial distortion.

Weber droplet breakup surface tension