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The rivulet flow pattern during oil–water horizontal flow through a 12 mm pipe
Authors:B De  TK Mandal  G Das
Institution:1. Department of Chemical Engineering, Indian Institute of Technology, Kharagpur 721 302, India;2. Department of Chemical Engineering, National Institute of Technology, Durgapur 713 209, India
Abstract:The present study reports the hydrodynamics of the rivulet pattern during oil–water flow through a 12 mm horizontal acrylic pipe. The interfacial distribution has been observed visually and characterized from signals obtained from an optical probe as well as by isokinetic sampling. The probability density function (PDF) and fast Fourier transform (FFT) of the signals have provided an understanding of the flow configuration. The experiments have revealed that although rivulet flow is a typical separated flow pattern, it has different characteristics as compared to the stratified and annular flow patterns. The holdup and pressure drop under such conditions have been compared with the drift flux model for horizontal flow as well as the two-fluid model as proposed by Brauner and Maron 9] for liquid–liquid flows.
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