Experimental and numerical modeling of the simultaneous effect of sluice gate and bump on hydraulic jump
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ORIGINAL ARTICLE
Experimental and numerical modeling of the simultaneous effect of sluice gate and bump on hydraulic jump Hamid Mirzaei1 · Hossein Tootoonchi2 Received: 28 January 2020 / Accepted: 26 May 2020 © Springer Nature Switzerland AG 2020
Abstract Sluice gate has always been used due to their ease of construction, control water level and measure flow discharge. Numerous studies have been carried out on sluice gates. On the other hand, estimating the discharge of flow below sluice gates is a major problem in many water engineering issues. The flow may become supercritical while passing the sluice gate. A bump can be used on the channel bed after the sluice gate in order to accelerate the formation of hydraulic jump phenomenon which converts supercritical flow to subcritical flow, therefore damages and undesirable effects caused by high water pressure in the supercritical flow can be prevented. In this paper, the simultaneous effects of sluice gate and bump in a channel on the formation of the hydraulic jump have been investigated. For this purpose, this phenomenon is modeled in hydraulic laboratory, then, it is simulated by FLOW3D numerical model. The desired conditions are carried out for four different locations of the bump with two different flow rates for each. Also, each experiment conducted on two types of positive and negative channel slope. Finally, a comparison is made between the fine and coarse mesh size on the numerical model to show the sensitivity of hydraulic jump simulation to meshing. The results indicate that as the location of the bump moves downstream of the channel for the positive slope of the channel, the location of the hydraulic jump formation goes downstream, and by decreasing the flow and giving negative slope to the channel, the location of occurrence of hydraulic Jump moves toward upstream of the channel. Also, comparison of different disturbance models indicates the superiority of LES disturbance model in showing jump disturbances compared to other models. Keywords Sluice gate · Bump · Hydraulic jump · FLOW3D numerical model · Turbulence models · Meshing
Introduction In order to utilize surface and underground water resources and conveying water from a place to another for irrigation or water supply purposes, several issues including measurement, diversion and control of flow are the most important fields in water resources management which have been of vital necessity since the beginning of human life. Among control, deviations and flow measurements structures, gates and bumps are more widely used due to their ease of construction and high precision measurement. Many researches have been conducted on sluice gate in two free and submerged states. The first extensive * Hossein Tootoonchi [email protected] 1
Department of Civil Engineering, Bu-Ali Sina University, Hamedan, Iran
College of Civil and Environmental Engineering, Amir-kabir University of Technology (Tehran Polytechnic), Tehran, Iran
2
experimental study was conducted by Henry (1950) for open and submerge
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