Abstract
Film coefficients of heat transfer for the bubble phase in gas-fluidized fluid-bed contactors are measured experimentally and correlated with operating variables. The coefficients thus obtained are of the same order as the gas film coefficients of mass transfer in tray-type gas liquid contactors. For experimental measurement new devices are developed to detect the fluctuating temperatures of emulsion and gas bubble phases, and also to distinguish the bubble phase from the emulsion phase. The temperature in the emulsion phase is shown to be inhomogeneous, fluctuating locally. Thus the mixing process of the emulsion phase seems to be not as good as has been previously thought.
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