Bond Number

Compare gravity against surface tension to assess shape control.

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.

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Bondgravitysurface tension

formula

KaTeX rendered

\begin{aligned}\text{Bo = delta\_rho g L\^{}2 / sigma}\end{aligned}

ASCII source

Bo = delta_rho g L^2 / sigma

delta rho (kg/m^3)g (m/s^2)L (m)sigma (N/m)

13.6250

shape control

gravity strongly affects shape

Bond number is a good first check for whether interface curvature or hydrostatics will dominate a droplet or bubble shape.

Bond gravity surface tension