Open AccessHydraulic Characteristics of Flow over Submerged Dams
Author(s) -
Fatin Mahmoud Shehab,
Sulaiman Dawood Jasim
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/881/1/012037
Subject(s) - froude number , hydraulic jump , dissipation , jump , mechanics , open channel flow , supercritical flow , hydraulics , compatibility (geochemistry) , flow (mathematics) , geotechnical engineering , mathematics , environmental science , geology , thermodynamics , physics , geochemistry , quantum mechanics
This study investigates the hydraulic characteristics of two types of submerged dams, where a standard submerged dam and another one supported by an oblique plane with an angle of (16°) constructed with the channel surface. A total of 30 experiments were carried out and 5 discharges for each of the above models were tested. The changes in Froude number (Fr), the length of the hydraulic jump, the distance of the hydraulic jump away from the origin (Dj) in addition to the comparison of the percentage of flow dissipation of energy for the two cases have been studied. The results showed have been indicate a significant changes in the length values of the hydraulic jump (Lj), the distance of the hydraulic jump from the origin (Dj), in addition an increase in the percentage of flow dissipation (E%) when adding the oblique plane to the submerged dam. The two models have been verified based on the Computational Fluid Dynamics to evaluate values for the required variables(E%, Lj, Dj,…) then theoretical and practical results are compared to show the agreement between them. the obtained results exhibit a good compatibility for most cases, especially for the first model where the compatibility ratio of the discharge and the rate of flow dissipation is up to 95% for the standard submerged dam. A compatibility of 97% also has been obtained for the relation between Froude number (Fr) and percentage of flow dissipation E (%) between theoretical and practical laboratory calculations of the above model.