کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
661085 | 1458162 | 2007 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Three-dimensional linear stability of natural convection in horizontal concentric annuli
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We have performed three-dimensional linear stability analyses of natural convection of air (Pr = 0.71) in horizontal annuli between concentric cylinders by using a spectral element method. A linear stability theory is applied to a basic two-dimensional steady solution which is called a crescent-shaped convection, and an eigenvalue problem of matrix form is constituted. We evaluate a critical Rayleigh number where the basic flow loses its stability with respect to three-dimensional disturbances over a wide range of aspect ratio (1 ⩽ A ⩽ 20). It is found that the instability mode which destabilizes the basic convection exchanges among three different modes, and the new transition lines are proposed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 50, Issues 7–8, April 2007, Pages 1388–1396
Journal: International Journal of Heat and Mass Transfer - Volume 50, Issues 7–8, April 2007, Pages 1388–1396
نویسندگان
Takahiro Adachi, Satoru Imai,