Bubble Rise Regime

Visualize bubble shape and rise speed from Eotvos/Morton numbers and a simple terminal-velocity estimate.

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

bubble riseEotvosMortonterminal velocity

formula

KaTeX rendered

\begin{aligned}\text{Eo = Delta rho g d\^{}2 / sigma}\\[0.35em]\text{Mo = g mu\_l\^{}4 Delta rho / (rho\_l\^{}2 sigma\^{}3)}\end{aligned}

ASCII source

Eo = Delta rho g d^2 / sigma, Mo = g mu_l^4 Delta rho / (rho_l^2 sigma^3)

bubble d (m)rho_l (kg/m3)rho_g (kg/m3)mu_l (Pa s)sigma (N/m)

Eotvos Eo

1.2219

Morton Mo

2.629e-11

terminal U (m/s)

0.1399

bubble Re

418.878

shape

ellipsoidal

Use as a regime preview for Euler-Euler or VOF setup. Deformable contaminated bubbles need more specific correlations.

bubble rise Eotvos Morton terminal velocity