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Description of apparatus which permits counterflow of 2 superposed streams of different densities to be maintained for period of time over appreciable length of uniform passage; velocity and density distribution measurements by chronophotography of injected droplets and analysis of point samples of fluid; results are presented in form of dimensionless ratios of interfacial shear and of mass transport as functions of Froude and Reynolds numbers.
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Macagno et al. (1961) studied this question.
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