کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
661594 1458136 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Molecular dynamics simulation of thermal conductivity of nanocrystalline composite films
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Molecular dynamics simulation of thermal conductivity of nanocrystalline composite films
چکیده انگلیسی

The efficiency of a thermoelectric material is measured by the figure of merit ZT, which is inversely proportional to the thermal conductivity. Superlattice structures often have a reduced thermal conductivity because of the introduction of interface scattering and, therefore, improved performance. The present work is focused on the effective thermal conductivity of nanocomposite films. This configuration could also improve ZT because of phonon-interface scattering introduced by the nanocrystals. The effects of crystal size and mass fraction are studied numerically using a molecular dynamics simulation. Results indicate that a reduction of 25% in the effective thermal conductivity can be achieved with the addition of nanocrystals which is comparable to that found in experimental measurement. However, the effective thermal conductivity was never reduced below the alloy limit.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 52, Issues 7–8, March 2009, Pages 2002–2008
نویسندگان
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