کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
662474 | 1458143 | 2008 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Height and stability of laminar plane fountains in a homogeneous fluid
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The behaviour of plane fountains, resulting from the injection of a denser fluid upwards into a large body of a lighter homogeneous fluid, is investigated numerically. The transient behaviour of fountains with a uniform inlet velocity, Reynolds number Re = 100, Prandtl number Pr = 7, and Froude number 0.25 ⩽ Fr ⩽ 10.0 is studied numerically. In the present case, the density variation is as a result of temperature difference between the fountain and the ambient fluids. Three distinct regimes are identified; steady and symmetric fountains for 0.25 ⩽ Fr ⩽ 2.0, unsteady fountains with periodic lateral oscillation for 2.25 ⩽ Fr ⩽ 3.0, and unsteady fountains with aperiodic lateral oscillations for Fr ⩾ 4.0. It is found empirically that the non-dimensional fountain height, zm, scales differently with Froude number in each of these regimes; in the steady and symmetric region zmâ¼Fr, in the unsteady and periodic lateral oscillation region zmâ¼Fr1.15 and in the unsteady and aperiodic lateral oscillation region zmâ¼Fr4/3. The results are compared with previous numerical and experimental results, where available and are consistent.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 51, Issues 19â20, September 2008, Pages 4717-4727
Journal: International Journal of Heat and Mass Transfer - Volume 51, Issues 19â20, September 2008, Pages 4717-4727
نویسندگان
N. Srinarayana, G.D. McBain, S.W. Armfield, W.X. Lin,