Document Type : Original Research Article
Authors
1
Department of Civil Engineering, Tonekabon Branch, Islamic Azad University, Tonekabon, Iran.
2
Assistant Professor, Department of Civil Engineering, Pooyesh Instituteof Higher Education, Qom.Iran
3
Department of Civil Engineering, Ardabil Branch, Islamic Azad University, Ardabil, Iran.
4
Department of Civil Engineering, Babol Branch, Islamic Azad University, Babol, Iran.
5
Department of Civil Engineering, Tonekabon Branch, Islamic Azad University, Tonekabon, Iran,
6
Department of Civil Engineering, Nowshahr Branch, Islamic Azad University, Nowshahr, Iran. Vghaseminejad@iau.ac.ir
7
PhD Candidate in Physical Oceanography at university of Hormozgan/ Iranian National Institute for Oceanography and Atomospheric science,
8
Department of Civil Engineering, Tonekabon Branch, Islamic Azad University, Tonekabon, Iran
Abstract
With the increase in construction in the sea, the use of protective structures to prevent their instability in the marine environment is of environmental concern. Coastal protection structures are used in marine structural engineering to reduce flow turbulence around marine structures to prevent scouring. In this research, the flow simulation around breakwaters constructed in the Dehnehsar Sefidroud area located in Guilan province was investigated using computational fluid dynamics and Fluent software. By constructing the breakwater structure, the speed between the breakwaters is reduced and conditions for sediment accumulation are provided. Also, the negative pressure on the west side of the western breakwater is reduced and reaches a positive value, changing from erosion potential to sedimentation potential. There is negative pressure in a part of the western tip of the breakwater, which will cause local scouring and needs protection. The results of the 2D and 3D models of isovelocity vectors with the installation of breakwaters of 90, 94 and 55 meters in length on the shore of the mouth of the Sefidrud River show that the velocity in the space between the 90, 94 and 55 meter breakwaters decreases, reducing the risk of scouring and allowing sediments that move west to east on the shore to accumulate. Also, the results of isovelocity vectors and contours show that with the installation of breakwaters implemented on the shore of the mouth of the Sefidrud River, the pressure in the space between the 94 and 55 meter breakwaters decreases, reducing the risk of scouring.
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