Numerical analysis of flow over side weir

In the present work the alternative concept of an elementary discharge coefficient along the longitudinal side weir was studied using an oblique weir. five different angles (30°, 45°, 60°, 75°, and 90°) in the flow direction (inclined to the left) with respect to the branch channel wall were examined. a numerical solution of two ordinary differential equations was proposed for discharge and flow depth conducted with program using euler’s method and compared with experimental values. results referred to the possibility of correlating water surface profile (w.s.p), water depth, and flow discharge numerically as well as the possibility of increasing flow discharge passing through the branch channel by an oblique side weir installation. thus flow discharge can be increased with side weir angle. maximum discharge occurred at an angle of 30° where the percent increase compared with that at 90° was 70%.