کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
657541 1458069 2014 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The effects of density on thermal conductivity and absorption coefficient for consolidated aluminum nanoparticles
ترجمه فارسی عنوان
اثر تراکم بر هدایت حرارتی و ضریب جذب برای نانوذرات آلومینیومی متخلخل
کلمات کلیدی
ضریب جذب تابش، هدایت حرارتی، پودر آلومینیوم، ترکیب آلومینیوم، نانوذرات
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی

Thermal conductivity and absorption coefficients were determined for a range of bulk densities for consolidated aluminum (Al) nanoparticle pellets by a laser flash analysis technique. Samples where heated on their front face using a Nd:YAG laser (1064 nm wavelength) and the temperature was measured on the rear face as a function of time. COMSOL Multiphysics® was used to model the experimental setup to determine the thermal conductivity and absorption coefficients. Thermal conductivity was found to increase with density from 0.2 to 1 W/(mK) for densities from 1.1 to 2.3 g/cm3 due to increase surface contact between particles. The absorption coefficient was found to range from 0.30 to 0.54 and increase with density for the range of bulk densities investigated. These results provide a fundamental understanding of properties influencing ignition mechanisms in aluminum containing materials.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 73, June 2014, Pages 595–599
نویسندگان
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