کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10682390 | 1015214 | 2005 | 18 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Numerical study of the Reynolds-number dependence of two-dimensional scour beneath offshore pipelines in steady currents
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی دریا (اقیانوس)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Numerical study of the Reynolds-number dependence of two-dimensional scour beneath offshore pipelines in steady currents Numerical study of the Reynolds-number dependence of two-dimensional scour beneath offshore pipelines in steady currents](/preview/png/10682390.png)
چکیده انگلیسی
A numerical model for local scour below pipelines is employed to investigate the Reynolds-number dependence of the two-dimensional scour beneath offshore pipelines in steady currents. A novel wall function is proposed in calculating the suspended sediment transport rate in the model. Scour developments beneath a model pipeline and the corresponding prototype pipeline are simulated under the same undisturbed Shields parameter but different values of Reynolds number. The effects of the Reynolds number difference on the scour profile development are investigated. It is found that scour depths for prototype pipelines are about 10-15% smaller than those for model pipelines. The flow phenomena that causes this difference are discussed by means of flow visualization. The normalized time scales are found to be approximately the same. The simulated scour profiles for the model pipelines agree well with the experimental results from an independent study.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ocean Engineering - Volume 32, Issue 13, September 2005, Pages 1590-1607
Journal: Ocean Engineering - Volume 32, Issue 13, September 2005, Pages 1590-1607
نویسندگان
Dongfang Liang, Liang Cheng, Kervin Yeow,