کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
823606 907091 2014 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of cylinder proximity to the wall on channel flow heat transfer enhancement
ترجمه فارسی عنوان
اثر مجاورت سیلندر به دیواره بر افزایش انتقال حرارت جریان کانال
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
چکیده انگلیسی

Heat-transfer enhancement in a uniformly heated slot mini-channel due to vortices shed from an adiabatic circular cylinder is numerically investigated. The effects of gap spacing between the cylinder and bottom wall on wall heat transfer and pressure drop are systemically studied. Numerical simulations are performed at Re=100Re=100, 0.1⩽Pr⩽100.1⩽Pr⩽10 and a blockage ratio of D/H=1/3D/H=1/3. Results within the thermally developing flow region show heat transfer augmentation compared to the plane channel. It was found that when the obstacle is placed in the middle of the duct, maximum heat transfer enhancement from channel walls is achieved. Displacement of circular cylinder towards the bottom wall leads to the suppression of the vortex shedding, the establishment of a steady flow and a reduction of both wall heat transfer and pressure drop. Performance analysis indicates that the proposed heat transfer enhancement mechanism is beneficial for low-Prandtl-number fluids.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Comptes Rendus Mécanique - Volume 342, Issue 2, February 2014, Pages 63–72
نویسندگان
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