کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
662056 1458175 2006 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Three-dimensional study of multiple transitions for natural convection in horizontal annuli
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Three-dimensional study of multiple transitions for natural convection in horizontal annuli
چکیده انگلیسی

Natural convection in horizontal differentially heated annuli is numerically investigated both by linear stability analysis and by solving the three-dimensional flow equations for a radius ratio R = 1.7. The governing equations were solved numerically by using a finite volume method. The stability of the basic crescent-shaped flows to three-dimensional disturbances is investigated. The existence of a stability region corresponding to a reversal from 3D- to 2D-flows is predicted for the first time. Three-dimensional computations show that multiple solutions are possible in the new stability region according to the initial conditions. Computations performed at supercritical Rayleigh numbers for the oscillatory régime elucidated the influence of the annulus length. Conflicting results reported in the archival literature are clarified.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 49, Issues 7–8, April 2006, Pages 1231–1241
نویسندگان
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