A hydrodynamic model for simulation of unsteady flow in storm sewer network systems

Abstract EN

In this work, a hydrodynamic numerical model for sewer networks has been developed, Unsteady flow in either tree-type or looped sewer networks systems has been simulated, The Prissmann slot assumption is adopted to extend open channel flow equations to closed conduits under surcharged conditions.

The link-node concept with a staggered grid, fully implicit scheme is developed to improve the stability and accuracy of the computation.

The model capable to reduce the order of the sparse matrix equations this has been achieved by treating the sewers of same diameter that connecting at a node with no lateral branching as a superlink, and the ends of the superlinks are defined as superjunctions so that considerable savings in computational effort is achieved.

The numerical experiments show that the model is robust and reliable for different configurations of storm sewer networks and gives consistent results under different grid setups.

Also, The experiments show an agreement with the results of few published studies.