Abstract
This paper provides the results of experimental stream flow patterns (water–oil) investigated in vertical and horizontal pipes with an elbow. The pipes are made from Perspex; the inner diameter is 0.024[Formula: see text]m, and the lengths of the vertical and horizontal pipes are 6 and 3[Formula: see text]m, respectively. The values of pressure at the four locations where [Formula: see text], 138, 248, and 304 are measured in various cases. The superficial velocities of the water range from 0.1 to 0.4[Formula: see text]m/s and of the oil from 0.1 to 0.9[Formula: see text]m/s. The pressure decreases with an increase in the height and the speed. Droplet/elongated/churn and annular streams are observed in a vertical pipe. The flow patterns are the stratified wavy stream with droplets at the interface, scattering (dispersion) of oil in water with a water layer, and annular flow in the horizontal pipe. These results of flow patterns are determined by a digital camera.
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