RAYLEIGH LIMIT CALCULATOR
A droplet tends to have a spherical shape because of the surface tension of the liquid. If it is electrically charged, the electrostatic repulsion between ions might overcome the surface tension, leading to its breakup. Upper estimates for the charge in spherical and cylindrical systems are given by the Rayleigh limits:
The calculator on the right uses these formulas to calculate the Rayleigh limit for a droplet of radius r or for a jet of length l and radius r. Input data:
If the radius of the droplet (jet) is not known, it can be estimated using the following quantities:
Version 2.0 04/18/2005: added the cylinder case.