Abstract
The paper presents an experimental approach to investigate the role of planar hydraulic jump in termination of stratified gas-liquid flow in a narrow rectangular conduit. When the Froude number of the incoming liquid Fr is greater than unity (supercritical flow), stratified flow is terminated via formation of “natural” planar jump in both co and countercurrent flow. While oscillatory jump induces flooding in countercurrent flow, undular jump results in slugging during co-current flow at higher phase velocities. The superficial gas and liquid velocities at onset of flooding confirm to the criterion proposed by Gargallo et al. (2005) and in co-current flow, the superficial gas and liquid velocities at the onset of large waves downstream of jump are well correlated by the criterion of Taitel and Dukler (1976). The jump types are displayed in a phase diagram that also depicts the domain of stable stratified flow bounded by slugging for co-current and flooding for counter current flow.
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