کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7058937 1458081 2013 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Model and simulation predictions of the thermal conductivity of compact random nanoparticle composites
ترجمه فارسی عنوان
پیش بینی مدل و شبیه سازی هدایت حرارتی کامپوزیت های تصادفی نانوذرات تصادفی
کلمات کلیدی
کامپوزیت های تصادفی نانوذرات، هدایت حرارتی، مدل تقریبی متوسط ​​موثر. سه سیستم نفوذ پذیری،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
The lattice thermal conductivity of compact random nanoparticle composites was investigated numerically as well as theoretically. By taking advantage of the three-dimensional Vorogoni diagrams, we were able to generate realistic numerical models of the composites. The phonon motion was then simulated in use of a Monte-Carlo simulator which employed an unstructured grid system (tetrahedron cells) and was developed under the single relaxation time approximation and the grey medium approximation. On the other hand, a new effective medium approximation (EMA) model was proposed in the present work to predict the thermal conductivity of nanoparticle composites which particles are all made of a same material type. This EMA model was next combined with the EMA model proposed by Liang and Ji (2000) for three bond percolation systems to predict the thermal conductivity of nanoparticle composites of two material types. It was found that with an effective particle diameter characterizing either the average particle volume or the average particle surface area, the model predictions agree excellently with the Monte-Carlo simulation results and match well with the measurements of nanostructured bulk alloys.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 61, June 2013, Pages 490-498
نویسندگان
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