Measurements of liquid film thickness of a wide horizontal co-current stratified air-water flow
2012
A horizontal co-current stratified two-phase flow was studied in a duct with
a rectangular section. Its dimensions were such that the top and side walls
did not influence the interfacial waves. The film thickness was almost of the
millimeter. The Reynolds number based on the mean height and velocity in each
phase varied from 0 to 1.16•105 in air and from 69 to 271 in water. These
experimental conditions allowed the observation of the smooth, 2D wavy and 3D
wavy stratified flow patterns. The interfacial waves were instantaneously
measured on a 100 mm long line segment in the longitudinal midspan plane of
the channel with the Level Detection and Recording technique. These
measurements yielded statistical characteristics and highlighted the spectral
differences between the 2D and 3D wavy stratified flow patterns.
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