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Three Dimensional Simulation of Flow for Semi Cylindrical Weirs Using Fluent Software Original Article, D60 Samadi A., Nejati S., Haji Azizi S., Oghati Bakhshayesh B. J. Civil Eng. Urban. 4(4): 397-401. 2014 ABSTRACT: The weirs are one of the important and prevalent items to measure discharge in open channels and they are used in most of the water distribution networks. Because of the higher discharge coefficient, simplicity in design, more stability of the flow on it in bigger scales, and lower costs rather to the other types of weirs is more superior. In the present study the pattern of the flow on semi cylindrical weirs simulated in three dimension via Fluent software. For simulating the multiphase flow, the Volume Of Fluid (VOF) model is used and in order to simulate the turbulence of flow, k-ε turbulence model is used, and extracted results of the numerical models are evaluated to experimental data extracted from physical models. In general considering the error percentage it could be said that the result extracted from Fluent software has a good adaptation to the experimental data for the same model. It is worth noting simulating the flow has done for three different radiuses of semi cylindrical weirs. Keywords: Flow pattern, Semi Cylindrical Weir, 3D simulation, K-ε Turbulence Model, Volume of Fluid Model, Fluent software منبع: [Hidden Content] دانلود: [Hidden Content].,%204%20(4)%20397-401,%202014.pdf J. Civil Eng. Urban., 4 (4) 397-401, 2014.pdf