کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1747692 1018241 2015 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Constructal entransy dissipation rate minimization for “volume-point” heat conduction at micro and nanoscales
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی مهندسی انرژی و فناوری های برق
پیش نمایش صفحه اول مقاله
Constructal entransy dissipation rate minimization for “volume-point” heat conduction at micro and nanoscales
چکیده انگلیسی

A “volume-point” heat conduction model with rectangular element at micro and nanoscales is re-optimized by taking the minimization of ‘entransy’ dissipation rate as optimization objective. The optimal constructs of the model with local optimization and global optimization constructal design methods under the effect of size effect are obtained. The results show that the size effect has remarkable effects on the optimal construct of the model. For the local optimization constructal design method, the optimal constructs of the rectangular second order assembly based on the minimizations of the entransy dissipation rate and hot spot temperature are different. The optimal construct of the rectangular second order assembly based on the minimization of entransy dissipation rate can reduce the average temperature difference better than that based on the minimization of the hot spot temperature, and improves the heat transfer ability simultaneously. The global heat transfer performances of the rectangular assemblies are evidently improved by adopting the global optimization constructal design method. The rectangular heat conduction model at micro and nanoscales is more generalized, and the results obtained by the constructal optimization of this model include those not only at micro and nanoscales but also at conventional scale.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the Energy Institute - Volume 88, Issue 2, May 2015, Pages 188–197
نویسندگان
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