Simulation of Flow Suspended Load in Weirs by Using Flow3D Model

Mehdi, Taghavi; Ghodousi, Hesam

doi:10.28991/cej-2015-00000004

Cited by 6 publications

(3 citation statements)

References 5 publications

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“…A weir is a barrier or dam-like structure built across a river or channel to control the flow of water. The water surface profile behind a weir is influenced by various factors, including the height of the weir crest, the discharge rate, and the characteristics of the channel downstream of the weir (Madadi et al, 2014;Taghavi and Ghodousi, 2015).…”

Section: Evaluation Longitudinal Section Using a Step-by-step Processmentioning

confidence: 99%

Evaluation of Backwater Flow Over Broad Crest Weir Using MATLAB Simulink

Shehab

2024

Ecol. Eng. Environ. Technol.

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The main purpose of the construction of weirs is to raise the water level and control it in front of the weir. It is important to know the longitudinal section of the variable flow behind the weir in the open channels. A total of 30 experiments were conducted in a horizontal laboratory channel with a length of 12 m, a width of 0.5 m, and a depth of 0.45 m. The longitudinal flow section was evaluated follow a step-by-step process under the influence of five different slopes of the channel bottom with five different flow discharges (0.035, 0.028, 0.022, 0.016 and 0.012 m 3 / sec), for each slope. After that, a Matlab simulation model was built in order to evaluate the longitudinal section of water surface, which is a plot of the water level along the length of the structure. The MATLAB Simulink gave more accurate results at speed that does not exceed seconds, as long mathematical equations.

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Section: Evaluation Longitudinal Section Using a Step-by-step Processmentioning

confidence: 99%

Evaluation of Backwater Flow Over Broad Crest Weir Using MATLAB Simulink

Shehab

2024

Ecol. Eng. Environ. Technol.

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“…Today, computer models based on numerical solutions are increasingly used in a wide range of applied research (Šimůnek et al, 2008;Syaiful et al, 2017;Agrebi et al, 2019;Yanuar et al, 2020). Flow-3D is one of the most powerful 3D software packages for computational fluid dynamics with a wide range of applications and capabilities (Parsaie et al, 2015) due to its critical features such as user-friendly specifications, high simulation efficiency, and strong graphical interface (Taghavi & Ghodousi, 2015). Despite the extensive studies on PKWs, there is still no comprehensive and accurate information on flow characteristics in this kind of overflow, as well as the relationships illustrating the straightforward changes of the inlet (Wi) and outlet (Wo) openings ratios, wall thickness and the height or flanging of outlet keys have not been provided till now.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Simulation Studies on Water Discharge Coefficients of Rectangular Piano Key Weirs

Rezaei¹,

Musavi-Jahromi²,

Khosrowjerdi³

et al. 2022

IJTech

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The piano key weir (PKW) is a developed type of labyrinth spillway with the ability to transfer large amounts of discharge by keeping executive costs constant. In this study, the parameters affecting the discharge coefficient of nine models were evaluated using physical models and simulations by Flow-3D software. The PKW models included: PK1.0, PK1.1, PK1.2, PK1.3, PK1.4, PK1.5, and PK1.6 representing the width ratios of the inlet (Wi) to outlet (Wo) keys of 1.0, 1.1, 1.2, 1.3, 1.4, 1.5 and 1.6 respectively and the other two models were PKT (PK1.1 with a thicker wall) and PKTP (PK1.1 with a thicker wall and an enhanced crown). According to the results of experimental and simulation evaluations, the model of PK1.4 was selected as the optimal model, which increased the discharge rate by 30% compared to the control weir. Moreover, increasing wall thickness (PKT model) led to an increase in the discharge and installing a parapet wall (PKTP model) resulted in an increase in discharge and a uniform distribution of flow lines on the weir. Considering the superiority of models PK1.4, PKT, and PKTP, the geometric properties of these models can be used to optimize the design of PKWs.

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“…Computational fluid dynamics (CFD) and the finite-volume method (FVM) have been applied many times for weir flow problems with satisfactory results (Hargreaves et al 2007;Arvanaghi and Oskuei 2013;Namaee et al 2014;Zeng et al 2017). The specific case of lateral wall weirs also has been studied several times (Aydin et al 2011;Taghavi and Ghodousi 2015;Namaee and Shadpoorian 2016), frequently using FLOW-3D simulation software for general free-surface problems, and specifically for weirs and free nappes (Sarkardeh et al 2014;Taghavi and Ghodousi 2015).…”

Section: Introductionmentioning

confidence: 99%

Numerical Model for a Nineteenth-Century Hydrometric Module

Costa

Felipe

Pitarch

2019

J. Irrig. Drain Eng.

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The Cequia of Manresa is a 26-km open channel constructed in the fourteenth century that conveys water from the Llobregat River to the city of Manresa using an elevation difference of 10.4 m. The channel is still operational today, supplying water for domestic, industrial, and agricultural uses to an overall population of 150,000 people. A hydrometric module was constructed in 1864 to regulate the flow rate in the Cequia to under 1,000 L=s. This module was dismantled in 1959 and is currently nonoperational. This work studied the operation of the module and determined whether it met the objectives for which it was built. The module was modeled numerically. Owing to the lack of experimental measures from the module, the model was validated with an analytical model from the literature, which demonstrated its accuracy. The model was created by applying computational fluid dynamics (CFD) using FLOW-3D software. The results showed that the numerical model reproduced the dynamic behavior of the hydrometric module (transitory), and that the old automated system operated correctly, limiting the flow to the required value. The numerical models can be used as a tool for historical research.

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Simulation of Flow Suspended Load in Weirs by Using Flow3D Model

Cited by 6 publications

References 5 publications

Evaluation of Backwater Flow Over Broad Crest Weir Using MATLAB Simulink

Evaluation of Backwater Flow Over Broad Crest Weir Using MATLAB Simulink

Experimental and Simulation Studies on Water Discharge Coefficients of Rectangular Piano Key Weirs

Numerical Model for a Nineteenth-Century Hydrometric Module

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