A preliminary investigation of the problem of mass transfer into turbulent liquid films
Perciful, Jerry C
Master of Science
An investigation was made to further the understanding of the, liquid phase resistance to mass transfer from a gas to a liquid film flowing down an inclined plate in the assumed turbulent region of the Reynolds Number range of 1,900 to 3, 300 with a planar interface and with a minimum of end and side effects. The results indicate that the mass transfer is molecular diffusion controlled and can be predicted by, Fick's Second Law of Diffusion. A comparison of the results and those of other investigators (who experienced wavy film flow) is made, the latter being ten times greater. Film thickness measurements, using a micrometer technique, show that none of the existing theories will predict the film thicknesses in the Reynolds Number range of 1,400 to 4,000. Friction factor results indicate the importance of shear at the free interface in flowing thin films. The film thickness results compare 'favorably with the most reliable results reported in the literature. Two models are proposed to predict mass transfer to a film with a turbulent character or to a film with a wavy interface.