کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6380978 | 1625637 | 2014 | 23 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Numerical calculation for bed variation in compound-meandering channel using depth integrated model without assumption of shallow water flow
ترجمه فارسی عنوان
محاسبه عددی برای تغییرات بستر در کانال ممانانه ای با استفاده از مدل عمودی بدون استفاده از جریان کم عمق
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کلمات کلیدی
کانال مجذور مرکب، تنوع تخت، جریان ثانویه، مدل عمق یکپارچه، فرض کمبود آب، روش محاسبه سرعت عمومی عمومی،
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فرآیندهای سطح زمین
چکیده انگلیسی
In a compound meandering channel, patterns of flow structures and bed variations change with increasing water depth owing to complex momentum exchange between high-velocity flow in a main channel and low-velocity flows in flood plains. We have developed a new quasi-three-dimensional model without the shallow water assumption, i.e., hydrostatic pressure distribution; our method is known as the general bottom velocity computation (BVC) method. In this method, a set of depth-integrated equations, including depth-integrated momentum and vorticity equations, are prepared for evaluating bottom velocity and vertical velocity distributions. The objective of this study is to develop a bed variation calculation method for both single and compound meandering channels by using the BVC method coupled with a sediment transport model. This paper shows that the BVC method can reproduce the pattern change of bed variation in a compound meandering channel flow with increasing relative depth. The variation in sediment transport rate due to overbank flow is explained by experimental and computational results.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Advances in Water Resources - Volume 72, October 2014, Pages 45-56
Journal: Advances in Water Resources - Volume 72, October 2014, Pages 45-56
نویسندگان
Tatsuhiko Uchida, Shoji Fukuoka,