کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5787154 1641111 2017 20 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Modeling of heat flow and effective thermal conductivity of fractured media: Analytical and numerical methods
ترجمه فارسی عنوان
مدل سازی جریان گرما و هدایت حرارتی موثر رسانه های شکست خورده: روش های تحلیلی و عددی
کلمات کلیدی
الگوی نماینده مورفولوژیکی، هدایت حرارتی، یکسان سازی، سنگ شکسته،
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فیزیک زمین (ژئو فیزیک)
چکیده انگلیسی
The present work aims to modeling the thermal conductivity of fractured materials using homogenization-based analytical and pattern-based numerical methods. These materials are considered as a network of cracks distributed inside a solid matrix. Heat flow through such media is perturbed by the crack system. The problem of heat flow across a single crack is firstly investigated. The classical Eshelby's solution, extended to the thermal conduction problem of an ellipsoidal inclusion embedding in an infinite homogeneous matrix, gives an analytical solution of temperature discontinuity across a non-conducting penny-shaped crack. This solution is then validated by the numerical simulation based on the finite elements method. The numerical simulation allows analyzing the effect of crack conductivity. The problem of a single crack is then extended to a medium containing multiple cracks. Analytical estimations for effective thermal conductivity, that take into account the interaction between cracks and their spatial distribution, are developed for the case of non-conducting cracks. Pattern-based numerical method is then employed for both cases non-conducting and conducting cracks. In the case of non-conducting cracks, numerical and analytical methods, both account for the spatial distribution of the cracks, fit perfectly. In the case of conducting cracks, the numerical analyzing of crack conductivity effect shows that highly conducting cracks weakly affect heat flow and the effective thermal conductivity of fractured media.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Applied Geophysics - Volume 140, May 2017, Pages 117-122
نویسندگان
, , , ,