| This paper presents the result of a numerical analysis and an experimental study of the irrotational gravity affected flow under sluice gates.;Vertical gates with 0.47 inches thickness for 0°, 15°, 30° gate lips were used for the numerical analysis and experimental study. Vertical gates with 2.0 inches thickness for 15°, 30° 45° gate lips were also used for experimental study.;It was found that the computer results compare satisfactorily with analytical and experimental data.;A finite element procedure is presented for the numerical analysis part of the study. The contraction coefficient, discharge coefficient and downstream water surface profile are the main parameters obtained. The flow field is discretized by triangular elements and the outflow free surface is represented by a portion of an ellipse. The downstream free surface profile is satisfied by choosing the major and minor axes of the ellipse, that minimize the deviation from the constant energy requirement. An iterative successive overrelaxation procedure was used to solve the unknown nodal values of the stream function. |
