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دوره 19، شماره 39 - ( 6-1402 )
جلد 19 شماره 39 صفحات 11-1 |
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hosseini D, Hakimzadeh H, Ghiasi R. Simulation of scour beneath pipeline due to tidal currents. Marine Engineering 2023; 19 (39) :1-11
URL: http://marine-eng.ir/article-1-1000-fa.html
URL: http://marine-eng.ir/article-1-1000-fa.html
حسینی داریوش، حکیم زاده حبیب، غیاثی رضا. شبیه سازی پدیده آبشستگی در اطراف خطوط لوله تحت اثر جریانهای جزر و مدی. مهندسی دریا. 1402; 19 (39) :1-11
داریوش حسینی1 
، حبیب حکیم زاده2 ، رضا غیاثی* 3
، حبیب حکیم زاده2 ، رضا غیاثی* 3
1- دانشجوی دوره دکتری دانشگاه صنعتی سهند
2- استاد، دانشکده مهندسی عمران دانشگاه صنعتی سهند
3- دانشیار دانشکده فنی دانشگاه تهران
2- استاد، دانشکده مهندسی عمران دانشگاه صنعتی سهند
3- دانشیار دانشکده فنی دانشگاه تهران
چکیده: (932 مشاهده)
جزر و مد به صورت مداوم باعث تغییر تراز آب در دریاهای آزاد میگردد و با توجه به استمرار و حاکمیت جریانهای ناشی از جزر و مد در محل خلیج ها، تنگه ها و خورها، لزوم بررسی پدیده های مرتبط با انتقال رسوب و آبشستگی در اطراف سازههای واقع در نواحی فوق بیش از پیش روشن میگردد. در این پژوهش با شبیه سازی عددی میدان جریان و انتقال رسوب، پدیده آبشستگی در زیر خطوط لوله ناشی از جریانهای رفت و برگشتی مورد بررسی قرار گرفته و به ازای مقادیر سرعت حدی معادل آستانه حرکت دانههای رسوب، عمق و تعداد سیکل جزر و مد جهت رسیدن به تعادل، مشخصات پروفیل آبشستگی ترسیم شده است. نتایج به دست آمده حاکی از افزایش عمق و سطح گودال آبشستگی ناشی از جریان جزر و مدی به دلیل تغییرات متناوب جهت جریان نسبت به آبشستگی ناشی از جریان تنها بوده و شکل نهایی پروفیل آبشستگی متأثر از فرآیند گردابه فکنی است.
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