Numerical Modeling of Local Scour at the Junction of Open Channels in Flow3D Numerical Model
Abstract: At the junction of
channels, the two corresponding flows of the main and submain channels are
diverted from their main alignment and the form and the flow properties change
at the junction. Changes in water level profile and depth of flow, velocity distribution,
stagnation zone, constriction of public channel, energy loss and also formation
of hydraulic jump are among the most important hydraulic variables in this
location. For accurate recognition of hydraulic properties of flow and local
scour at the junction of channels, physical models are made and constructed.
Setting up a physical model requires many conditions and high costs which
sometimes are not justifiable, hence appropriate numerical models could be
proposed for such options. In this research using Flow3D numerical model, the
numerical modelling of the flow has been performed in 3D form utilizing the
available laboratory information which is calibrated and validated and accuracy
of the numerical modelling, and the corresponding relative error are
determined. The calibration and validation of the numerical model results
demonstrate that the maximum relative error of the numerical model when
simulating for maximum values of scour depth at the flow junction is equal to
8.2%. Also using the numerical model it was found that with passage of time in
numerical model, from .....
Author: Behnam Shamohamadi,
Ali Mehboudi
Journal Code: jptsipilgg160059
