On the erosion of the bottom caused by a suspended turbulent jet

The paper considers the problem of the impact of a turbulent jet on an eroding bottom. A mathematical model of the problem is proposed, including the Reynolds equations, kinetic energy transfer equations, turbulence dissipation, suspended particle concentrations and the equation of channel deformations. To describe changes in the bottom surface, an original equation of bottom deformations is used, constructed on the basis of an analytical model of the movement of traction sediments. An algorithm for solving the problem using the control volume method is proposed. Numerical modeling of the problem showed that when the bottom is eroded under the influence of a turbulent jet, a characteristic bottom wave arises, the parameters of which in the erosion region are consistent with known experimental data.