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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

Determination of Energy Dissipation in Stepped Spillways Using Finite Element and Finite Volume Methods Original Article, C24 Shoja F, Nikpour M.R, Sadeghi H. Journal. Civil Eng. Urban. 3(4):150-155. 2013 ABSTRACT:Accurate and suitable design of Spillways as major parts of dams is very important in the stability and safety of dams. In this study, flow over stepped spillway was simulated in 2D by solving poisson functions of stream and pressure in Finite Element method and with analyzing k-ε turbulence and volume of fluid models in Finite Volume technique. Also a comparison was done between the results of numerical models and measured values in order to investigate the accuracy of the models in calculation of energy dissipation. The relative error percent average of energy dissipation calculation using Finite Element and Finite Volume approaches was achieved 2.85% and 1.26%, respectively. Results showed Finite Volume approach could be employed slightly better than Finite Element method in modelling flow hydraulic over stepped spillway. Keywords: Finite Element, Finite Volume, Stepped Spillway, Turbulence Model, Volume of Fluid Model منبع: [Hidden Content] دانلود: [Hidden Content].,24-150-155.pdf J. Civil Eng. Urban.,24-150-155.pdf