Droplet Breakup Check

Classify likely droplet breakup behavior from Weber and Ohnesorge numbers.

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

droplet breakupWeberOhnesorgeatomization

formula

KaTeX rendered

\begin{aligned}\text{We = rho\_c U\_rel\^{}2 d / sigma}\\[0.35em]\text{Oh = mu\_d / sqrt(rho\_c sigma d)}\end{aligned}

ASCII source

We = rho_c U_rel^2 d / sigma, Oh = mu_d / sqrt(rho_c sigma d)

continuous rho (kg/m^3)relative U (m/s)droplet d (m)sigma (N/m)droplet mu (Pa s)

40.8333

0.0761

regime

bag breakup likely

Breakup thresholds are approximate air-blast heuristics. Use them as a CFD setup sanity check, not a model closure.

droplet breakup Weber Ohnesorge atomization