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NA. Laryngoscope, 126:1136-1142, 2016.

The stepped spillways consist of concrete steps on the spillway discharge channel to assist in the dissipation of the kinetic energy of the water flow. This structure reduces size or eliminates the need for an additional energy dissipator on downstream toe. In this study, an investigation of nappe flow regime has been carried out to study the influence of operating conditions on the hydrodynamics and mass transfer characteristics on the steps of the spillway by using two-fluid computational multiphase fluid dynamics (CMFD) modeling. The numerical work was performed by means of the program ANSYS CFX 11.0 software. The CMFD results are validated with experimental observation. Thus, the numerical performance of nappe flow is analyzed.