کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
799463 1467086 2013 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Nonlinear asymptotic homogenization and the effective behavior of layered thermoelectric composites
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Nonlinear asymptotic homogenization and the effective behavior of layered thermoelectric composites
چکیده انگلیسی

Thermoelectric materials are promising in converting heat directly into electricity, and composite materials are often used to enhance thermoelectric figure of merit. In this work, we develop a nonlinear asymptotic homogenization theory to analyze the effective behavior of layered thermoelectric composite with coupled transport of electricity and heat. The nonlinearly coupled thermoelectric transport equations are homogenized using asymptotic analysis, from which the macroscopic field distributions are derived with local fluctuation averaged out, and overall thermoelectric conversion efficiency is established using an idealized thermoelectric module. It is discovered that the thermoelectric field distributions in the composite are different from those in a homogeneous material, and they are difficult to be fitted by homogeneous solution. Furthermore, it is noted that while the effective thermoelectric properties of the composite can be defined through a set of equivalency principle, these effective properties depend on specific boundary conditions, resulting in effective figure of merit that is not correlated with thermoelectric conversion efficiency directly. The analysis thus sheds considerable insight into the effective behavior of thermoelectric composites for their design and optimization.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the Mechanics and Physics of Solids - Volume 61, Issue 8, August 2013, Pages 1768–1783
نویسندگان
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