Modelación numérica (CFD) del flujo combinado superior e inferior en una compuerta plana con el programa Flow 3D

Abstract

This work is developed with the purpose of numerically modeling, the Peissner´s physical model (1989), to establish criteria for quantifying the upper and lower simultaneous discharge, respectively, in a sluicegate-weir, composed of an upper clapper, and a lower gate, considering that this device, in addition to allowing the regulation of flow rates and levels in a hydraulic system, has the particularity of being a self-cleaning device, because through the upper discharge, it allows the evacuation of floating material that could be carried by flow, and through the lower discharge evacuates the sediments that it could contain.

From numerical modeling of different operating scenarios, the values of the upper and lower discharges were obtained, and their characteristics were defined, identifying that the approach flow to the control structure, it has a separation surface manifesting itself as a virtual bottom, which affects the upper discharge.

Based on the results obtained, graphs are presented that allow quantifying the discharge flows, upper, and lower, respectively, from the geometry of the control structure, the approach height, and the load on the weir, whose measurement is feasible.