کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
656674 1458047 2016 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Significant heat transfer enhancement in microchannels with herringbone-inspired microstructures
ترجمه فارسی عنوان
افزایش انتقال حرارت قابل توجه در میکرو کانال ها با میکروارگانیسم های الهام گرفته از نخل
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی


• Experimental study of herringbone-inspired microstructures for heat transfer.
• Flow promoters yield up to fourfold higher Nu number compared to plain microchannel.
• Best device: Nu = 36.6 at Re = 510.
• Overall performance enhancement including adverse pressure drop: 220% at Re = 350.

Herringbone microstructures are a very promising class of flow promoters to passively enhance heat transfer in microchannels by efficiently triggering helicoidal fluid motion. A host of applications are envisioned to benefit from heat transfer enhancement in microchannels, including microfluidic interlayer cooling of 3D electronic chip stacks, or advanced concepts of integrated cooling and electrochemical power delivery. Here we investigate the cooling performance of microchannels with such flow promoters and show that the Nusselt number reaches an average value of Nu = 36.6 at a Reynolds number of Re = 510 for our best performing design. This result constitutes a fourfold improvement in heat transfer capability compared to a plain microchannel. The fluid temperature is assessed optically using micron-resolution laser induced fluorescence (μLIF), while the wall temperature is measured with on-chip resistance thermometers. In addition, we determine the pressure drop originating from the presence of the herringbone flow promoters. By taking into account both the beneficial heat transfer enhancement and the adverse increase of pressure drop in a non-dimensional figure of merit (FoM), we demonstrate a significant performance enhancement of 220% at Re = 350 using herringbone structures for heat transfer augmentation compared to a plain, unstructured reference microchannel.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 95, April 2016, Pages 755–764
نویسندگان
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