Abstract

A new methodology introducing in fluvial hydraulics the concept of Rossiter modes is proposed to close the equations system describing the sediment-laden flow over mobile bed. It is performed through the use of control factor m, considered as the central key element describing the interactions occurring in alluvial rivers. Indeed, it is the sole parameter intervening into the energy slope and the transport capacity predictions. The equations system with the new closure methodology is solved by an explicit Finite Volume Method and confronted to experimental data.

Keywords: Rossiter modes, fully coupled mobile-bed alluvial hydraulics, sediment transport capacity, computational fluid dynamics