Asset Details
Do you wish to reserve the book?
Bed sill effectiveness in reducing flow separation at open channel confluences: an openfoam-VOF 3D CFD study
Hey, we have placed the reservation for you!
By the way, why not check out events that you can attend while you pick your title.
Oops! Something went wrong.
Looks like we were not able to place the reservation. Kindly try again later.
Are you sure you want to remove the book from the shelf?
Bed sill effectiveness in reducing flow separation at open channel confluences: an openfoam-VOF 3D CFD study
Do you wish to request the book?
Bed sill effectiveness in reducing flow separation at open channel confluences: an openfoam-VOF 3D CFD study
Please be aware that the book you have requested cannot be checked out. If you would like to checkout this book, you can reserve another copy
We have requested the book for you!
Your request is successful and it will be processed during the Library working hours. Please check the status of your request in My Requests.
Oops! Something went wrong.
Looks like we were not able to place your request. Kindly try again later.
Journal Article
Bed sill effectiveness in reducing flow separation at open channel confluences: an openfoam-VOF 3D CFD study
2026
Overview
The Flow Separation Zone (FSZ) is a key hydrodynamic feature of open channel confluences, and its reduction contributes to improved channel efficiency. This study employs the open-source computational fluid dynamics (CFD) software OpenFOAM to examine the influence of a bed sill on reducing the FSZ at a right-angled open channel confluence. The flow is simulated by solving the three-dimensional (3D) Reynolds-averaged Navier–Stokes (RANS) equations with the SST
k–ω
turbulence model, while the interFoam multiphase solver is used to capture the water–air interface via the Volume of Fluid (VOF) method. The numerical model is validated against experimental data from the literature by comparing velocity fields and water surface elevations. Different sill sizes, locations, and configurations are tested to evaluate their effectiveness in reducing the FSZ. The results indicate that strategically placed sills can shorten the FSZ length by up to 55%, while modifying velocity profiles and reducing flow recirculation. Using multiple sills, particularly a three-sill configuration, further enhances this effect, reducing the FSZ length by as much as 74%. Analysis of secondary currents shows that sills intensify these currents, thereby enhancing momentum exchange and reducing the flow separation. Furthermore, energy loss analyses conducted for various sill configurations demonstrate that strategically positioned sills can reduce the energy loss significantly.
