Eötvös number
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In fluid dynamics the Eötvös number (Eo) is a dimensionless number named after Hungarian physicist Loránd Eötvös (1848-1919).
Together with Morton number it can be used to characterize the shape of a fluid sphere (air bubble, water drop...). Eötvös number may be regarded as proportional to buoyancy forces divided by surface tension forces.
- Δρ: difference in density of the two phases, (SI units : kg/m3)
- g: gravitational acceleration, (SI units : m/s2)
- L: characteristic length, (SI units : m)
- σ: surface tension, (SI units : N/m)
[edit] Reference
R. Clift, J.R.Grace, M.E. Weber, Bubbles Drops and Particles, Academic Press New York, 1979, p.26
