کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1725805 | 1520717 | 2013 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Poiseuille flow across an eccentrically confined stationary/rotating cylinder
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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: Poiseuille flow across an eccentrically confined stationary/rotating cylinder Poiseuille flow across an eccentrically confined stationary/rotating cylinder](/preview/png/1725805.png)
چکیده انگلیسی
Effect of eccentricity-ratio and rotation on a Poiseuille flow across a stationary/rotating cylinder is studied numerically for various Reynolds number (Re=50-150) at a blockage ratio of β=20%. Several interesting flow-patterns and flow-transition, for various eccentricity-ratio (â75%â¤Î³â¤+75%) and rotational-velocity (0â¤Î±â¤2) at Re=100 are noted. The flow patterns are understood with the help of streamlines and vorticity contours. The ensuing flow is analyzed with the help of separation point on the surface of the cylinder, strength and trajectory of the shed-vortices and flow distribution above and below the cylinder. Flow-transition from unsteady to steady flow is reported as a flow-regime map, at various values of α and γ. Stabilization effect is more at positive as compared to negative eccentricity, for counter clockwise (CCW) rotating cylinder. It is established that the mechanism of flow-stabilization is different for positive and negative eccentricity, for rotating cylinder. For stationary cylinder, increase in eccentricity causes a reduction in the drag-coefficient and Strouhal-number; and a change in the direction of lift force at higher eccentricity ratio. Under the influence of rotation, a reduction (enhancement) in the drag-force is obtained at a constant positive (negative) eccentricity. Stabilization effect of rotation and eccentricity can be used for flow control.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ocean Engineering - Volume 73, 15 November 2013, Pages 41-54
Journal: Ocean Engineering - Volume 73, 15 November 2013, Pages 41-54
نویسندگان
Kaushal Prasad, Amit Agrawal, Atul Sharma,