Abstract:The secondary flow is deflected under pressure and superimposed on the
main flows. This research investigated its characteristics, including
velocity gradient, vorticity, shear stress, and Reynolds stress in
unpressurized circular pipes, through physical experiments and
Computational Fluid Dynamics numerical simulations. Combining numerical
simulations with the physical experiments under three flow rates (30 m
/h, 35 m /h, and 40 m
/h) and width–perimeter ratios (
W = 0.43, 0.4, and 0.35), the experimental dat… Show more
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