https://hal-amu.archives-ouvertes.fr/hal-02535854Ivanova, K.K.IvanovaIUSTI - Institut universitaire des systèmes thermiques industriels - AMU - Aix Marseille Université - CNRS - Centre National de la Recherche ScientifiqueGavrilyuk, S.S.GavrilyukIUSTI - Institut universitaire des systèmes thermiques industriels - AMU - Aix Marseille Université - CNRS - Centre National de la Recherche ScientifiqueStructure of the hydraulic jump in convergent radial flowsHAL CCSD2019pattern formationshallow water flowsshear waves[MATH] Mathematics [math][NLIN] Nonlinear Sciences [physics][SPI] Engineering Sciences [physics]Gavrilyuk, Sergey2020-04-07 18:08:072023-03-24 14:53:152020-05-25 12:33:18enJournal articleshttps://hal-amu.archives-ouvertes.fr/hal-02535854/document10.1017/jfm.2018.901application/pdf1We are interested in the modelling of multi-dimensional turbulent hydraulic jumps in convergent radial flow. To describe the formation of intensive eddies (rollers) at the front of the hydraulic jump, a new model of shear shallow water flows is used. The governing equations form a non-conservative hyperbolic system with dissipative source terms. The structure of equations is reminiscent of generic Reynolds-averaged Euler equations for barotropic compressible turbulent flows. Two types of dissipative term are studied. The first one corresponds to a Chézy-like dissipation rate, and the second one to a standard energy dissipation rate commonly used in compressible turbulence. Both of them guarantee the positive definiteness of the Reynolds stress tensor. The equations are rewritten in polar coordinates and numerically solved by using an original splitting procedure. Numerical results for both types of dissipation are presented and qualitatively compared with the experimental works. The results show both experimentally observed phenomena (cusp formation at the front of the hydraulic jump) as well as new flow patterns (the shape of the hydraulic jump becomes a rotating square).