Numerical Simulation of Flow and Scour in a Laboratory Junction
AbstractConfluences 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
Share & Cite This Article
Ahadiyan, J.; Adeli, A.; Bahmanpouri, F.; Gualtieri, C. Numerical Simulation of Flow and Scour in a Laboratory Junction. Geosciences 2018, 8, 162.
Ahadiyan J, Adeli A, Bahmanpouri F, Gualtieri C. Numerical Simulation of Flow and Scour in a Laboratory Junction. Geosciences. 2018; 8(5):162.Chicago/Turabian Style
Ahadiyan, Javad; Adeli, Atefeh; Bahmanpouri, Farhad; Gualtieri, Carlo. 2018. "Numerical Simulation of Flow and Scour in a Laboratory Junction." Geosciences 8, no. 5: 162.
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.