I’m simulation the 3D flow field in a compound channel with sloped main channel banks. I created the grid using the Multifunction grid generator.
For the case with mild slope banks of the main channel the simulated flow field agrees well with the experimental data. But for the case with steep banks, local velocity amplification occurs along the interface of the main channel and floodplain which does not agree with the experimental data.
any comments and suggestions will be appreciated.