کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
657351 1458060 2015 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Natural convection from horizontal heated cylinder with and without horizontal confinement
ترجمه فارسی عنوان
حرارتی طبیعی از سیلندر افقی گرم با و بدون محوطه افقی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی

Laminar natural convection flow around horizontal heated cylinder with and without confinement is numerically studied. Confinement is done above or below the cylinder at various vertical positions. Two-dimensional computational models using finite volume formulation have been developed and validated against experimental data. Local heat transfer predictions are correlated for an unconfined single cylinder. The significance of confinement on the top and bottom side of the cylinder is clearly demonstrated for a wide range of Ra  , and spacing between the cylinder and the confinement. In case of top confinement, the increase in NuθNuθ at the upper portion of the cylinder depends on the position of the wall. The confinement below the cylinder caused a reduction in Nu‾ at the bottom half of the cylinder as compared to the top half. For both cases, the effect of confinement can be neglected at high H/DH/D ratios.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 82, March 2015, Pages 325–334
نویسندگان
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