NUMERICAL SIMULATION FOR SUBMERGED FLOW THROUGH SLUICE GATE HAVING BIG OPEN HEIGHT

Abstract

 Theoretical estimation of discharge coefficient of submerged flow through sluice gate is generally agreed to be difficult, when open height is big and water level of the downstream side of gate is close to water level of the upstream side. Numerical simulation of submerged flow was conducted on the conditions that open height is big, including the above-mentioned case. The results confirmed that characteristics of discharge coefficient estimated by simulation was generally consistent with theoretical characteristics, and that the relations of open height and discharge coefficient were estimated using cubic curve approximation passing through the origin.