The oscillating jet phenomena is the result of pressurized liquid that is forced through an elliptical orifice which produces a jet with properties
of standing waves . The oscillating crests and troughs are the result of sur- face tension forces in the liquid. Bohr (1909) presented the theory and rela- tionship between surface tension and measurable physical properties such as the flow rate of the liquid, wavelength and major and minor axes radii .