کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
646330 | 884560 | 2014 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Numerical study of heat transfer enhancement of channel via vortex-induced vibration
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Numerical study of heat transfer enhancement of channel via vortex-induced vibration Numerical study of heat transfer enhancement of channel via vortex-induced vibration](/preview/png/646330.png)
چکیده انگلیسی
Thermal diffusion in a developed thermal boundary layer is considered as an obstacle for improving the heat transfer rate of air-cooled heat sinks. In this work, a passive method using vortex-induced vibration (VIV) is introduced to disrupt the thermal boundary layer and thereby increase the heat transfer rate. A cylinder with a flexible plate is placed in a clean channel; the vortex shedding due to the cylinder gives rise to the oscillation of the plate downstream. The consequent flow-structure-interaction (FSI) strengthens the disruption of the thermal boundary layer by vortex interaction with the walls, and improves the mixing process. This novel concept is demonstrated by a two-dimensional modeling study at ReDÂ =Â 204.8, 245.7, 286.7, 327.7, and two inlet temperature profiles. The results indicate the VIV can significantly increase the average Nusselt (Nu) number, with a maximum enhancement of 90.1% over that of a clean channel.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Thermal Engineering - Volume 70, Issue 1, 5 September 2014, Pages 838-845
Journal: Applied Thermal Engineering - Volume 70, Issue 1, 5 September 2014, Pages 838-845
نویسندگان
Junxiang Shi, Jingwen Hu, Steven R. Schafer, Chung-Lung (C.L.) Chen,