Next Article in Journal
Temporal and Spatial Variability of Sediment Transport in a Mountain River: A Preliminary Investigation of the Caldone River, Italy
Next Article in Special Issue
Morphodynamic Trends of the Ribb River, Ethiopia, Prior to Dam Construction
Previous Article in Journal
Virtual Crop Water Export Analysis: The Case of Greece at River Basin District Level
Open AccessArticle

Numerical Simulation of Flow and Scour in a Laboratory Junction

1
Water Sciences Engineering Faculty, Department of Hydraulic Structures, Shahid Chamran University of Ahvaz (SCU), Ahvaz 61357-83151, Iran
2
Hydraulic Structures at Shahid Chamran University of Ahvaz (SCU), Ahvaz 61357-83151, Iran
3
Hydraulic Engineering at Civil, Architectural and Environmental Engineering Department (DICEA), University of Naples Federico II (UNINA), 80125 Napoli NA, Italy
4
Environmental Hydraulics at Civil, Architectural and Environmental Engineering Department (DICEA), University of Naples Federico II (UNINA), 80125 Napoli NA, Italy
*
Author to whom correspondence should be addressed.
Geosciences 2018, 8(5), 162; https://doi.org/10.3390/geosciences8050162
Received: 13 April 2018 / Revised: 24 April 2018 / Accepted: 30 April 2018 / Published: 3 May 2018
Confluences are a common feature of riverine systems; the area of converging flow streamlines and potential mixing of separate flows. The hydrodynamics about confluences have a highly complex three-dimensional flow structure. This paper presents the results of a numerical study using the CCHE2D code to investigate the influence of junction angle and discharge ratio on the flow and erosion patterns. The hydraulic and geometric parameters which affect the maximum relative scouring depth are analyzed. The model is first calibrated and validated. Then three discharge ratios, seven junction angles and five width ratios are considered and compared. Results generally agree with experimental data and show that the process of scouring depends on all these parameters. Numerical results demonstrate that a decrease in the ratio of the tributary width to the main channel width results in an increase in the size of the separation zone. Furthermore, the increase in the width ratio leads to a decrease in the maximum depth of bed erosion. Finally, the maximum depth of bed erosion at the confluence increases with the increasing angle of the junction. View Full-Text
Keywords: confluence; computational fluid dynamics; flow patterns; separation zone; erosion confluence; computational fluid dynamics; flow patterns; separation zone; erosion
Show Figures

Figure 1

MDPI and ACS Style

Ahadiyan, J.; Adeli, A.; Bahmanpouri, F.; Gualtieri, C. Numerical Simulation of Flow and Scour in a Laboratory Junction. Geosciences 2018, 8, 162.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop