کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
644791 1457134 2016 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Silicon carbide nanowires suspensions with high thermal transport properties
ترجمه فارسی عنوان
سوسپانسیون های سیلیکون کاربید نانو سیم ها با خواص حمل و نقل حرارتی بالا
کلمات کلیدی
سیلیکون کاربید (ماد) نانو سیم ها؛ سیستم های تعلیق؛ نسبت ابعاد بزرگ؛ رسانایی گرمایی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی


• The ethylene glycol suspensions containing SiC nanowires were prepared.
• The thermal conductivity of SiC/EG suspensions is significantly improved.
• The large aspect ratio of SiC nanowires favors thermal conductivity enhancement.
• The experimental data are in reasonable agreement with Hamilton–Crosser model.

Nanofluids have a broad prospect for thermal management applications in many fields. In this paper, ethylene glycol (EG) suspensions containing silicon carbide (SiC) nanowires were prepared by mechanical mixing. The average thermal conductivity of suspensions with SiC nanowires is greatly improved compared with that of pure EG, and it increases with the volume fraction of SiC nanowires. When the SiC loading is 5.0 vol.%, the thermal conductivity of the suspension was 0.443W/mK, increasing 67.2% with respect to pure EG. There is no obvious temperature dependency for the thermal conductivity enhancement ratio. These experimental results are in reasonable agreement with predicted values of Hamilton–Crosser model. The research confirms that the shape factor of SiC has a critical effect on the effective thermal conductivity of suspensions. Meanwhile, it validates that the SiC nanowires have stronger ability to enhance thermal conductivity of suspensions than the other shapes. It is due to the large aspect ratio of SiC nanowires, which can easily form bridges between them, known as conductive network. The formation of random bridges or networks from conductive particles facilitates phonon transfer, leading to high thermal conductivity.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Thermal Engineering - Volume 94, 5 February 2016, Pages 350–354
نویسندگان
, , , , ,