کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
657140 1458055 2015 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Analysis of convective heat transfer improved impeller stirred tanks by the lattice Boltzmann method
ترجمه فارسی عنوان
تجزیه و تحلیل انتقال حرارت کنترلی با استفاده از روش بولتزمن با استفاده از مخزن مخلوطی از پروانه محکم شده است
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی

This paper performs the lattice Boltzmann simulation combined with unknown-index algorithm for the convective heat transfer problems of an impeller stirred tank. Three types of motion of the heating impeller are adopted in this study, including rotation with constant angular velocity, oscillation and oscillating rotation, which are denoted as Types I, II, and III stirrings respectively. Because the flow structures in rotation stirring case are concentric vertical, the heat transfer efficiency of the tank walls is lower than those of the other two types of stirrings. The other two types of stirrings, the flow structures include complex vortices and present better field synergy of the fluid velocity and temperature gradient, which positively contributes to the convective heat transfer efficiency. The results also indicate that a large swing process angle of the impeller with oscillating rotation stirring does not have significant advantage, because the flow phenomena would be similar to that of constant angular velocity stirring case. Basically, the Type III stirred tank can be considered as an improved Type II stirred tank by choosing appropriate process angle.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 87, August 2015, Pages 568–575
نویسندگان
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