Abstract
We have experimentally found the liquid film flow characteristics rising along the outer surface of a rotating cone, where the surface tension, Coriolis force, pressure gradient etc. work to maintain the liquid film on the surface of the cone. When the film flow goes up fully upward, the liquid film can not keep the filmwise condition and is eventually atomized into a mist flow. The mechanism can be used in a new device to atomize liquid and to generate the mist flow. In this research, we apply the new atomization mechanism to an oxygen mass transfer from the air to the water through the atomized water droplets. A dissolved oxygen concentration is measured for variations of rotation rates of the cone, and a volumetric mass transfer coefficient is calculated from the measured data. It is found that the mist flow is effective for the oxygen mass transfer judging from the obatained quite large oxygen transfer coefficient.
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