کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
657051 1458054 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermal conductivity of Si/Ge nanocomposites with fractal tree-shaped networks by considering the phonon interface scattering
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Thermal conductivity of Si/Ge nanocomposites with fractal tree-shaped networks by considering the phonon interface scattering
چکیده انگلیسی


• Fractal tree-shaped network is introduced to reconstruct the Si/Ge nanocomposites.
• Molecular dynamics simulation is used to study the thermal conductivity of nanocomposites.
• Fractal network nanostructure is superior in the reduction of thermal conductivity.
• Fractal network with larger interface density are preferred for Si/Ge nanocomposites.

The fractal tree-shaped network is introduced to reconstruct the Si/Ge nanocomposites in this paper with a focus on reducing the thermal conductivity of thermo-electrical materials by enhancement of phonon scattering at the interfaces of nanostructures. The molecular dynamics simulation with the use of the empirical Tersoff potential is applied to study the thermal conductivity of Si/Ge nanocomposites with fractal tree-shaped networks. The effects of fractal dimensions and branch level on the thermal conductivity of nanocomposites are evaluated and analyzed. The results indicate that, compared with conventional rectangular core, the fractal tree-shaped network is more superior in the reduction of thermal conductivity of nanocomposites owing to stronger phonon interface scattering for larger interface density. In particular, the larger length and width fractal dimensions as well as more branch levels are preferred for the Si/Ge nanocomposites with fractal tree-shaped networks.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 88, September 2015, Pages 572–578
نویسندگان
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