کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
662645 1458148 2008 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Flow and heat transfer characteristics of the boundary layers over a stretching surface with a uniform-shear free stream
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Flow and heat transfer characteristics of the boundary layers over a stretching surface with a uniform-shear free stream
چکیده انگلیسی
In this work, the momentum and thermal boundary layers over a continuously stretching surface with a uniform-shear free stream were investigated. Based on the boundary layer assumptions, the similarity equations were obtained, which were solved numerically. Theoretical analysis was conducted for certain special conditions. The solution domain for the momentum boundary layer was theoretically estimated and compared with the numerical results. It is found that the interaction of uniform-shear free stream and the wall stretching velocity greatly affects the fluid motion and heat transfer characteristics. Dual solutions exist for the stretching parameter γ > γc = −0.596985. There is one solution for γ = γc and no solution for γ < γc. The effects of the Prandtl number, Pr, the temperature power index, m, and the wall stretching parameter, γ, on the heat transfer behaviors were analyzed and discussed. A general exact analytical solution of thermal boundary layers was derived for non-stretching wall condition with γ = 0 and arbitrary values of Pr and γ. Analytical solutions were also given for m=-23 and m = 0 with arbitrary values of Pr and m. Interesting observations were found for negative wall stretching parameter, negative temperature power index, and the lower solution branch.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 51, Issues 9–10, May 2008, Pages 2199-2213
نویسندگان
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