کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
660800 1458139 2009 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Numerical implementation of thermal boundary conditions in the lattice Boltzmann method
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Numerical implementation of thermal boundary conditions in the lattice Boltzmann method
چکیده انگلیسی

This work proposed a non-equilibrium mirror-reflection scheme to implement thermal boundary conditions for the two-distribution lattice Boltzmann method (TLBM). The study showed that the most popular non-equilibrium bounce-back scheme would become inadequate when the predictions of temperature gradient were examined in TLBM. This work used the native method in TLBM to verify temperature gradient instead of the conventional finite difference approximation. The simulation results demonstrated that the mirror-reflection scheme is a scheme of second-order accuracy and can predict the temperature and temperature gradient correctly. With help of calculating the heat flux on the boundary, this work also suggested a more efficient and realistic way to determine the Nusselt number in Rayleigh–Bénard convection problems.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 52, Issues 1–2, 15 January 2009, Pages 529–532
نویسندگان
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