Studies on Liquid Entrainment

Bursting of gas bubbles was experimentally studied, using the liquids listed in Table 1. Large drops were caught on a slide coated with a mixture of vaseline and light mineral oil, and the diameters of the drops were measured through a microscope.The relation between the diameter of the gas bubble and the height which the drops entrained above the gas-liquid interface is shown in Figs. 3, 4 and 5, and the relation between the diameter of the gas bubble and the diameter of the drops is shown in Fig. 6. The velocity of the rising drops was calculated from Eq. (3).In the next stage, a general theoretical formula was derived for the case in which several drops were formed from a single bubble:where, N is the number of drops. Comparison of the theoretical values of the velocity of drops with the experimental data shown in Fig. 9 may verify the adequacy of the above equation, except for the case of liquids with high viscosity.A natural circulation type evaporator for radioactive liquid waste disposal was constructed, and overall decontamination factor was obtained. The factor ranged over 105 to 107 for vapor mass velocities of 200-3, 000 kg/mm2hr as shown in Fig. 12.