Numerical investigation of the effects of combining sewer junction characteristics on the hydraulic parameters of flow in fully surcharged condition

Motlagh, Yaser Yekani; Nazemi, Amir Hossein; Sadraddini, Ali Ashraf; Abbaspour, Akram; Motlagh, Saber Yekani

doi:10.1111/j.1747-6593.2012.00347.x

Cited by 6 publications

(3 citation statements)

References 35 publications

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“…Saiyudthong [49] concluded that the surface simulation technique has a minor influence on energy loss coefficients when the manhole is highly surcharged. Zhao et al [26] and Motlagh et al [13] performed numerical simulations for rectangular and circular manholes, in which they used the VOF method to define the surface shape and location. Besides the surface properties, they also calculated the energy loss coefficients from the CFD results, compared them with the experimental results, and approved them.…”

Section: Numerical Model Procedures and Boundary Conditionsmentioning

confidence: 99%

“…The inlet and outlet flow in different directions make the surface wavy and undulating, and vortex formations are observed in some regions of the manhole. Moreover, transitions between wholly and partially filled pipes are generally seen in the manhole regions [10,12,13]. Moreover, the complex nature of flow is affected by an almost infinite variety of geometrical and hydraulic factors [14].…”

Section: Introductionmentioning

confidence: 99%

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Experimental and Numerical Determination of Head Loss Coefficients of Two-Way Surcharged Manholes

Dündar,

Özölçer,

Doğan

2023

Water

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The loss coefficient is one of the most critical parameters in computing the hydraulic grade line of sewer systems. The head loss coefficient of a manhole is dependent on various hydraulic and structural characteristics, such as manhole mold, connection angle, and the ratio of manhole diameter to pipe diameter. Three different manhole molds, flat, half-bench, and full-bench, and connection angles of 180°, 90°, and 135° are investigated, where the manhole diameter to pipe diameter ratio is 5.3. This paper presents the results of experimental and numerical investigations focused on determining the loss coefficient for two-way straight-through and angled manholes. The flow structure inside the chimney is the significant parameter for the magnitude of the energy loss coefficient. The head loss coefficient is almost constant under the surcharged flow conditions for all kinds of manholes. In terms of head loss coefficients, half-channel manholes do not have a significant advantage over flat-bottomed manholes in the cases of 135° and 90° flow inputs. The full-bench bottom manhole head loss coefficient is the smallest. The computational fluid dynamic modeling results agree with the experimental studies.

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Section: Numerical Model Procedures and Boundary Conditionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Determination of Head Loss Coefficients of Two-Way Surcharged Manholes

Dündar,

Özölçer,

Doğan

2023

Water

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“…Motlagh et al investigated energy losses and flow behaviour in a more realistic model of a manhole with two inlet and one outlet pipe, reporting that increasing the height of the lateral inlet pipe causes energy loss coefficient to decrease as a result of decreasing eddy flow [5]. Chen et al performed a CFD analysis for optimization of a municipal sewer system design aiming to optimize the design of an existing combined sewer system and the numerical model was validated using experimental results [6].…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Investigation of a Deficient Stormwater Drainage System

Yılmazer,

Çelik

2024

Eskişehir Technical University Journal of Science and Technology a - Applied Sciences and Engineering

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In this paper, a deficient stormwater system was investigated with experimental and numerical methods. The main goal was to obtain an experimentally validated 3D computational fluid dynamics (CFD) model to identify the problems of the system and offer design solutions via numerical modeling. A scaled physical model of the structure was built for CFD validation. The validation was done via comparisons of point pressure statistics, discharge and water levels. Different mesh structures and turbulence closure methods were also tested for verification of the model. The validated model was then used to determine the cause of the problems in the structure. New geometries were tested numerically to suggest solutions to the detected problems. Empirical approaches and also regulations for the stormwater structures were also considered for comparison. Findings of this study suggest that a verified and validated CFD model is an effective tool to investigate special geometries for specific hydraulic structure problems where conventional approaches are insufficient.

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Supercritical flow in junction manholes under invert- and obvert-aligned set-ups

Crispino

Pfister

Gisonni

2018

Journal of Hydraulic Research

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Numerical investigation of the effects of combining sewer junction characteristics on the hydraulic parameters of flow in fully surcharged condition

Cited by 6 publications

References 35 publications

Experimental and Numerical Determination of Head Loss Coefficients of Two-Way Surcharged Manholes

Experimental and Numerical Determination of Head Loss Coefficients of Two-Way Surcharged Manholes

Experimental and Numerical Investigation of a Deficient Stormwater Drainage System

Supercritical flow in junction manholes under invert- and obvert-aligned set-ups

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