ارزیابی دقت مدل عددی FLOW-3D در شبیه سازی جریان عبوری از بندهای تاخیری پاره سنگی به عنوان راهکاری مناسب برای مقابله با سیلاب و خشکسالی

Given the climatic reality that floods and droughts are two sides of the same coin, planning should be shifted towards simultaneous management of floods and droughts with watershed. One of the watershed management strategies is to control the flood control of concrete and soil storage dams. In times of drought, the construction of these dams in waterways and upstream water collection and floods exacerbate drought downstream. Therefore, the use of porous structures such as porous delay clauses that simultaneously manage flood and drought can be suggested as an appropriate solution. In these conditions, construction of delayed dams requires proper hydraulic design considering flow behavior in the face of the mentioned structure. The main objective of this study was to evaluate the accuracy of FLOW-3D software in the simulation of hydraulic flow flowing over and inside rockfill dams with different geometries and discharges. The studies in this field are based on the use of relations between the Reynolds number and the friction coefficient or hydraulic gradient and flow velocity, which are not accurate enough by complex geometry.
Therefore, in this study, with a new approach and without considering these relationships, the flow in the rockfill dam has been simulated using Flow-3D model. Comparison of numerical simulation results with experimental results showed that the model with less than 10% error can simulate current in delayed dams and can be used as a tool for designing such structures.