Effect of sediment transport on flow characteristics in non-prismatic compound channels

Selim, Tarek; Hesham, Mahmoud; Elkiki, Mohamed

doi:10.1016/j.asej.2022.101771

Cited by 8 publications

(3 citation statements)

References 23 publications

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“…So the velocity and consequently, the size of the re-circulation bubble reduces. Another research also observed this for dense and dilute sediment-concentrated fluids [30]. The S marks in Figure 6, indicate the location of the bubbles' focies [31].…”

Section: The Surface Line Integral Convolution At Z/h= 025supporting

confidence: 55%

Numerical Modeling of Sediment-flow around Obstacle Inspired by Marine Sponges: Considering Body Configurations

Hashempour

Kolahdoozan

2023

IJE

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Coral reefs are exposed to extinction due to the sediment blocking through coral colonies. In this condition, there is no practical solution that originates from nature. Among all aquatic animals, marine tubular sponges have marvelous mechanisms. These natural creatures can inspire the design of a device for managing sediment-flow hydrodynamics. They suck flow from body perforation and pump water and undigested materials from the top outlet. Therefore, coinciding with receiving nutrients, the flow becomes circulated. This may help the momentum transfer through the coral colonies. In the current study, a synthetic sponge by motivating the tubular sponges was designed. Synthetic sponges' suction/pumping discharge was constant at 150 L/h. They have a body diameter of 8 and 15 cm and a height of 20 cm. The perforation area distribution changes to understand how it may influence sedimentflow hydrodynamics. The numerical modeling based on Reynolds Averaged Navier Stokes (RANS) equations and image processing technique (surface LIC) were deployed to determine the vortical flow patterns. Results confirmed that choosing the best body perforation configuration and area distribution can generate the dipole vortex. In this condition, a tornado combines with dipole and erodes the sediments to ≈ 30% near the bed. Moreover, the sediment concentration reduces to ≈ 20% in the water column at X/D =1. In this condition, it can be observed that the emergence of specific vorticities and recirculations develops the suspension of particles. Therefore, the synthetic sponge with precise design can be practical for enhancing the momentum transferring and preventing pollutant blockage among coral colonies.

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Section: The Surface Line Integral Convolution At Z/h= 025supporting

confidence: 55%

Numerical Modeling of Sediment-flow around Obstacle Inspired by Marine Sponges: Considering Body Configurations

Hashempour

Kolahdoozan

2023

IJE

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“…In previous studies, the effect of sediment transport on flow characteristics in a non-prismatic compound channel was observed (Nazari-Giglou et al 2016;Sakib et al 2022;Selim et al 2022). These studies employed CFD software to investigate sediment transport in non-prismatic compound channels, considering both primary (water) and secondary (sediment) phases.…”

Section: Experimental Modelingmentioning

confidence: 99%

“…These studies employed CFD software to investigate sediment transport in non-prismatic compound channels, considering both primary (water) and secondary (sediment) phases. The various sediment sizes and mass discharges were examined, revealing that stream-wise flow velocity decreased for small sediment sizes and increased sediment mass discharge (Selim et al 2022). Turbulence decreased in the presence of sediments, particularly near the free channel surface.…”

Section: Experimental Modelingmentioning

confidence: 99%

A Comprehensive Review on Sediment Transport, Flow Dynamics, and Hazards in Steep Channels

Mir,

Patel

2024

JWMM

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The hydrological channel networks of the steep mountains are extensively designated and organized geographic systems and are very complicated. They are composed of granular beds that are uneven and are subjected to fluid forces that fluctuate spatially and temporally. The flow and movement of sediment in these streams are significantly shaped by large rocks such as boulders. However, it is difficult to comprehend these mountain streams because significant information is unavailable regarding these channels as compared to plane bed streams. To address this issue, a critical review of the numerical, computational fluid dynamics, and machine learning mechanisms underlying sediment transport across different flow conditions in steep channels is presented while considering the current and foreseeable conditions for various sediment transport phenomena. The present study emphasized to carry out further analysis on these steep channels using advanced available techniques to get an insight into the morphology of these channels. Furthermore, the hazards associated with steep mountain channels are reviewed as they have a significant impact on infrastructure and habitation in mountainous regions.

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Numerical analysis of sediment transport and depth averaged flow velocity in non-prismatic compound channels

Selim

Hesham

Elkiki

et al. 2023

Ain Shams Engineering Journal

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Effect of sediment transport on flow characteristics in non-prismatic compound channels

Cited by 8 publications

References 23 publications

Numerical Modeling of Sediment-flow around Obstacle Inspired by Marine Sponges: Considering Body Configurations

Numerical Modeling of Sediment-flow around Obstacle Inspired by Marine Sponges: Considering Body Configurations

A Comprehensive Review on Sediment Transport, Flow Dynamics, and Hazards in Steep Channels

Numerical analysis of sediment transport and depth averaged flow velocity in non-prismatic compound channels

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