کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8059141 1520212 2017 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermal boundary layer in stagnation-point flow past a permeable shrinking sheet with variable surface temperature
ترجمه فارسی عنوان
لایه مرزی حرارتی در جریان نقطه رکود از یک ورق کوچک قابل نفوذ با دمای سطح متغیر
کلمات کلیدی
راه حل های دوگانه، انتقال گرما، لایه مرزی، جریان نقطه رکود، ورق کوچک قابل نفوذ غیر ایزوترمال، ساکشن / تزریق، دمای سطح متغیر،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی مهندسی انرژی و فناوری های برق
چکیده انگلیسی
An investigation is made to study the heat transfer in boundary layer stagnation-point flow over a non-isothermal permeable shrinking sheet with suction/injection. In this study, power-law variation of sheet temperature is considered. By similarity transformation, the governing equations with the boundary conditions are transformed to self-similar nonlinear ordinary differential equations and then those are solved numerically by shooting method. In presence of variable sheet temperature, the variation of temperature is analysed. For larger shrinking rate compared to that of straining rate, dual solutions for velocity and temperature are obtained. It is found that for positive value of power-law exponent of variable sheet temperature heat transfer at the sheet as well as heat absorption at the sheet with temperature overshoot near the sheet occur and for negative value heat transfer from the sheet occurs though there is overshoot away from the sheet. With increasing positive power-law exponent heat transfer reduces for first solution and heat absorption enhances for second solution. Whereas, with increasing magnitude of negative power-law exponent heat transfer increases for second solution and for first solution the heat transfer increases for larger shrinking rate and it decreases for smaller shrinking rate. Due to suction heat transfer/absorption increases in all cases and for injection heat transfer/absorption increases for first solution and decreases for second solution. Also, interesting effects of suction/injection and Prandtl number on temperature distribution are observed when the sheet temperature varies (directly/inversely) along the sheet.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Propulsion and Power Research - Volume 6, Issue 3, September 2017, Pages 186-194
نویسندگان
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