کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
7057316 1458070 2014 10 صفحه PDF سفارش دهید دانلود رایگان
عنوان انگلیسی مقاله ISI
Energy transport across submicron porous structures: A Lattice Boltzmann study
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موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
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Energy transport across submicron porous structures: A Lattice Boltzmann study
چکیده انگلیسی
The technological advancement in the field of energy conversion demand exploring new materials with low value of thermal conductivity. The reduction in the thermal conductivity of a material can be achieved by decreasing its device dimension and increasing the porosity of the material. Lattice Boltzmann Method (LBM), a discrete form of Boltzmann Transport Equation (BTE) has been employed in the present study to examine the energy transport across semiconductor and metal structures. A newly proposed lattice weight system is exercised to alleviate the anisotropic phonon movement in the D2Q9 lattice. The study explores the comparison of different pore configurations classified based on shape and material with varying interfacial pore scattering. In semiconductors, the selection of pore geometry and specularity parameter has been exploited comprehensively in scaling down the thermal properties. Results reveal for rectangular and square pores, thermal conductivity varies inversely with the pore scattering area. Also the comparative analysis of Debye and Sine dispersion model is performed. The role of electron-phonon contribution towards thermal conductivity in metals is analyzed. When energy is transported across the metallic gold film, the electron contribution of the total thermal conductivity exhibits considerable size effects, however phonon contribution remains unaltered with that of its bulk value.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 72, May 2014, Pages 479-488
نویسندگان
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