Analyzing Parameters Influencing Scour Bed in Confluence Channels Using Flow3D Numerical Model
Abstract: Channels junction is
a phenomenon which is used in most of irrigating and drainage networks and in
hydraulic engineering in general. In two channels junction, main and secondary
channels encounter with each other and move to the channel downstream. Scour
holes and sedimentation zones are created in channels bed. 3D simulation of
scour hole created in these channels is influenced by various factors. The
ratio of main channel width to secondary channel width is one of the most
important influencing factors. This parameter is the main focus of the present
research. In the present study, a model calibrated with laboratory results has
been simulated. The numerical model results have revealed that decreasing the
ratio of main channel width to secondary channel width causes the secondary
channel flow encounters to the front wall of the secondary channel. Also, it
leads to creating scour near the front wall and the main hole is drawn towards
the wall. Furthermore, in the present research, topographical changes of the
bed with running time of the numerical model for the middle channel axis has
been extracted and presented.
Author: Behnam Shamohamadi,
Ali Mehboudi
Journal Code: jptsipilgg160064
