Abstract
We observed liquids dripping out of an aperture at low Reynolds number using CCD camera, measured the mass of a drop and the velocity of falling drops, and estimated dynamic surface tensions. Reynolds number ranges from 1 to 200. The solutions tested in this experiment are AE solutions in water. A modeling of surfactant molecules was presented for predicting the normalized dynamic surface tension of surfactants. It was confirmed that the expression obtained by this model approximately agrees with the experimental values.
