کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4993782 1458024 2018 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A new hydrodynamic boundary condition simulating the effect of rough boundaries on the onset of Rayleigh-Bénard convection
ترجمه فارسی عنوان
یک شرایط مرزی هیدرودینامیکی جدید که اثر مرزهای خشن بر شروع همرفت Rayleigh-Bénard را شبیه سازی می کند
کلمات کلیدی
همرفت Rayleigh-Bnard؛ تجزیه و تحلیل ثبات خطی؛ مرزهای خشن؛ شرایط مرزی هیدرودینامیکی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
This paper introduces a new hydrodynamic boundary condition which enables the simulation of the effects caused by rough boundaries. The classical Rayleigh-Bénard stability analysis is performed here to investigate the onset of thermal convection in a parallel-plate channel with rough boundaries. The hydrodynamic boundary conditions are modified, from the classical treatment, in order to consider channel boundaries characterised by non-negligible roughness. This roughness is simulated as a shallow fluid saturated porous medium and the Saffman interface condition is thus employed to model the hydrodynamic boundary conditions. The normal mode method is employed and the obtained eigenvalue problem is solved numerically. The Principle of Exchange of Stabilities is proved and the critical values of the Rayleigh number and of the wave number are obtained.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 116, January 2018, Pages 581-586
نویسندگان
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