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International Journal of Coastal and Offshore Engineering، جلد ۹، شماره ۴، صفحات ۲۰-۲۹
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عنوان انگلیسی Numerical simulation of flow for improved width of the shipwreck in the curvature of the Waal River in Netherlands by using of Groyns
چکیده انگلیسی مقاله One of the effective methods for protecting the shores of navigable rivers at the site of the arches is the use of groynes. In order to study a case in the Netherlands, a numerical study was carried out on the effects of using submerged vanes with vertical groynes on the protection of the Waal coast in Netherlands. In the present study, the numerical results of the impact of vertical groynes series with 5 angular deviations were compared to the external arc wall with a length of 25% channel width (87.5 m) and a spacing of 595.859 meters with a nonsubmerged vane at a distance of one fourth of the width of the internal arc with a full arc length of 90 degrees are paid to the average velocity distribution and pressure in the arc of 90 degrees, with a width of 350 meters and a depth of 4.5 meters. The results of the study showed that the presence of groynes series causes uniformity of upstream velocity and high- velocity transmission from the inner arc to the middle of the canal. In the case of the presence of groynes in the outer arc with a submerged vane close to the inner arch, about one quarter of the width of the internal arc produces a counterflow stream that reduces the normal secondary flow in the bends of the river. Hence, the high- velocity current, which is driven radially to the inner shore, is diverted to the middle direction. So it will improve the sedimentation on the inner shore of the bend and scouring on the outer shore of the bend. In this way, the flow rate from the mean value of one meter per second reaches 1.98 m/s in the middle region and decreases from the sedimentation in this range.
کلیدواژه‌های انگلیسی مقاله Groyne,Flow Pattern,Secondary Currents,90 degree bend,Waal river
نویسندگان مقاله Mehdi Nezhadnaderi |
Department of Civil Engineering, Tonekabon Branch, Islamic Azad University, Tonekabon, Iran.

Soha Kiaei |
Department of Civil Engineering, Tonekabon Branch, Islamic Azad University, Tonekabon, Iran.

Seyed Mohammad Mosavi |
Department of Civil Engineering, Tonekabon Branch, Islamic Azad University, Tonekabon, Iran

Adeleh Saedei |
Department of Civil Engineering, Tonekabon Branch, Islamic Azad University, Tonekabon, Iran

Abolfazl Bagheri |
Department of Civil Engineering, Tonekabon Branch, Islamic Azad University, Tonekabon, Iran

نشانی اینترنتی https://www.ijcoe.org/article_214844_5b5dcd36efbc8714c2abac3adf0b9111.pdf
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