کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4493890 | 1318679 | 2010 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Three-dimensional structures in a shallow flow
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم کشاورزی و بیولوژیک (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Three-dimensional structures in a shallow flow Three-dimensional structures in a shallow flow](/preview/png/4493890.png)
چکیده انگلیسی
Contrary to two-dimensional turbulence, decaying turbulence in a shallow fluid layer is characterized by the presence of long-lived meandering currents. This paper investigates the structure of vertical motion present inside the free-surface shallow-fluid layer and its relation with these currents. Downward motion is concentrated in thin elongated strain-dominated regions around instantaneous hyperbolic points and upward flow is observed in rotation-dominated patches around elliptic points. We show that the emergence of meandering currents results from inherent three-dimensionality of the flow due to the presence of the no-slip bottom. Our findings seriously question the assumption of quasi-two-dimensionality of shallow-fluid layer flows.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hydro-environment Research - Volume 4, Issue 2, July 2010, Pages 89-101
Journal: Journal of Hydro-environment Research - Volume 4, Issue 2, July 2010, Pages 89-101
نویسندگان
A.R. CieÅlik, L.P.J. Kamp, H.J.H. Clercx, G.J.F. van Heijst,