Capillary Number Calculator
Compute the capillary number Ca = μv/σ (viscous vs surface tension).
Input Data
Dynamic Viscosity
Pa·s
Velocity
m/s
Surface Tension
N/m
Results
Ca = μv/σ.
0.00013736
At a glance:Ca = μ·v/σ; Ca ≪ 1 means surface tension dominates. Complements bond-number and capillary-rise.
Formula
Ca = μ·v / σ.
$$\mathrm{Ca} = \dfrac{\mu\,v}{\sigma}$$How to Use
- Enter μ, v and σ.
- The tool returns the capillary number.
Case Studies
μ=0.001, v=0.1, σ=0.072
Ca ≈ 0.00139.
FAQ
Capillary vs Bond?
Capillary uses viscous force; Bond uses gravity.
Related Tools
References
Content review: Calculatorism Science Team. Results are for reference only; please refer to the relevant authorities for the official figures.