کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4993867 1458027 2017 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A simple difference method for lattice Boltzmann algorithm to simulate conjugate heat transfer
ترجمه فارسی عنوان
یک روش تقسیم ساده برای الگوریتم بولتزمن شبکه برای شبیه سازی انتقال حرارت متحرک
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
In the present paper, a simple difference method for lattice Boltzmann algorithm is proposed to simulate conjugate heat transfer problems. In the conventional lattice Boltzmann method (LBM), the informations including temperature and heat flux exchange directly between two different media through distribution function during the streaming process, however, the continuity of heat flux at the interface between two different media cannot be guaranteed in this process. Different with the conventional LBM, we consider that the nodes near the interface get the distribution functions from the interface during the streaming process across the interface. The distribution functions at the interface can be obtained by coupling the interface conditions of temperature and heat flux with non-equilibrium extrapolation. Four test cases are used to validate the present method, including both steady and transient conjugate heat transfer with flat or curved interfaces. The results show that the present method is very easy to implement, and feasible for both steady and transient heat transfer problems. In addition, for simplicity, by approximating the real interface with a staircase shaped line, the present method can deal with curved interface easily and the results show the approximation will not contribute obvious error to the final results.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 114, November 2017, Pages 268-276
نویسندگان
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