Author(s): Nicolas Riviere; Richard Perkins; Anuel Mignot
Linked Author(s): Richard J. Perkins
Keywords: Hydraulic jump; Channel junction; Subcritical flow; Supercritical flow
Abstract: This study focuses on the discharge distribution in an intersection of four channels, similar to a city crossroad. Flow enters through two of the channels, and leaves through the other two. The main variables that are measured are the flow rates in the four channels. First, the channels and the intersection are all horizontal. The flow is subcritical everywhere, and flow depths are controlled by vertical weirs at the exits of the outlet channels. When the weir heights in the outlet channels are the same, the ratio of flowrates in the outlet channels depends only on the ratio of flowrates in the inlet channels; if the outlet conditions are different, other parameters, such as the total flow rate also become important. Second, slopes of few percent are fixed to obtain supercritical flows. The relationship between the ratio of flowrates in the inlet and in the outlet channels is far more complicated, as it is influenced by the position of the hydraulic jumps in the intersection.
Year: 2005