Numerical Simulation of 3D Flow in Right-angled Confluences with Bed Elevation Discordance in Both Converging Channels

Đorđević, Dejana; Stojnić, Ivan

doi:10.1016/j.proeng.2016.07.592

Cited by 6 publications

(2 citation statements)

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“…The perpendicular velocities were enhanced by the tributary bed steps along the side wall of the intersection and by the main channel bed steps along the opposite wall. (Dordevica and Stojnic, 2016) [57] As mentioned before, Biron et al (2004) [13] studied the flow in channel confluences in two cases, a laboratory confluence (Bradbrook et al, 2001) [48] and a field confluence (Lane et al, 1999) [14]. In this case, PHOENICS (CHAM, Inc., London) was used to examine mixing in the same laboratory confluence as in Figure 7 but with discordant beds (Figure 11), and in a natural discordant stream confluence (Figure 12).…”

Section: Asymmetrical Shapedmentioning

confidence: 99%

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Review and Comparison of Numerical Simulations of Secondary Flow in River Confluences

Shaheed

Yan

Mohammadian

2021

Water

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River confluences are a common feature in natural water resources. The flow characteristics in confluences are complicated, especially at junction areas between tributaries and the main river. One of the typical characteristics of confluences is secondary flow, which plays an important role in mixing, velocity, sediment transport, and pollutant dispersion. In addition to the experimental and field studies that have been conducted in this area, the development of computational fluid dynamics has allowed researchers in this field to use different numerical models to simulate turbulence properties in rivers, especially secondary flows. Nowadays, the hydrodynamics of flows in confluences are widely simulated by using three-dimensional models in order to fully capture the flow structures, as the flow characteristics are considered to be turbulent and three-dimensional at river junctions. Several numerical models have been recommended for this purpose, and various turbulence models have been used to simulate the flows at confluences. To assess the accuracy of turbulence models, flows have been predicted by applying different turbulence models in the numerical model and the results have been compared with other data, such as field, laboratory, and experimental data. The purpose behind these investigations was to find the suitable model for each case of turbulent flow and for different types of confluences. In this study, the performances of turbulence models for confluences are reviewed for different numerical simulation strategies.

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Section: Asymmetrical Shapedmentioning

confidence: 99%

“…Shumate's laboratory confluence channel was used by Dordevica and Stojnic (2016) [57] to examine the flow through the use of the SSIIM2 (NTNU, Inc., Norway) 3D finite-volume based numerical model. The confluence consisted of a junction of two straight channels at a 90-degree angle (Figure 15).…”

Section: Asymmetrical Shapedmentioning

confidence: 99%