Hydrogen bubble flow visualization in two-phase two-component studies.

Although the hydrogen-bubble flow visualization technique has been widely exploited in single-phase studies, it appears to have seen little or no application to studies in two-phase flow . The use of this technique is described in connection with two two-phase two-component systems; one was a situation in which quantitative information was obtained for flow around an air bubble injected through an orifice into a pool of water while the second was a forced-convection study in which qualitative information on downflow of liquid at the tube wall was obtained. Both studies employed high-speed cine photography. The advantages and disadvantages of this technique as applied to two-phase situations are discussed. (A)