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Numerical Investigation of Sluice Gates' Shape Factor on Contraction Coefficient Original Article, B13 Sadeghfam S and Akhtari AA. Journal. Civil Eng. Urban. 2(2): 72-74. 2012. ABSTRACT:The behavior of flow under sluice gate and determining the water profile is one of the important issues in hydraulic engineering. In this study the contraction coefficient is studied and the effect of slice gate's shape is observed numerically by CFD model. The turbulence model k-e (RNG) and unsteady flow mode are used in analysis of two dimensional gates. Three types of slice gate's shapes are analyzed and contraction coefficient of these cases is presented and compared with experimental and theoretical results of other researchers. It is worth mentioning that for these cases the equations in terms of the ratio of gate opening to depth of approaching flow behind gate, are collected. So the gate's shape has significant role on contraction coefficient and between 3 types of gate's shapes that are investigated in this research, contraction coefficient of the sluice gate with shape of two side slope (case 3) has larger amount of this coefficient. Keywords: Sluice Gate, CFD model, Contraction Coefficient, Turbulence Model k-e (RNG) منبع: [Hidden Content] دانلود: [Hidden Content].,B13-72-74.pdf J. Civil Eng. Urban.,B13-72-74.pdf