کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6733315 504055 2014 33 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Numerical study of air flow and heat transfer in a two-dimensional enclosure with floor heating
ترجمه فارسی عنوان
مطالعه عددی جریان هوای و انتقال حرارت در یک محفظه دو بعدی با حرارت کف
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
چکیده انگلیسی
In this paper, two-dimensional modeling for floor heating as well as concentrated heating, were performed numerically for an enclosure instead of a room. Governing equations for turbulent incompressible flow (continuity, momentum and energy equations) coupled with radiation, were solved using Boussinesq approximation and control volume approach. The modified k − ɛ model for turbulence and the DO model for radiation were adopted within the framework of SIMPLE algorithm. Different physical boundary conditions such as air absorptivity, floor temperature, wall temperatures and window dimension were applied and results for floor heating were compared with those obtained for concentrated heating. Results for the floor heating show that 74% of heat transfer from floor to the walls and the air in the room was in the form of radiation and the rest was due to convection. Study of temperature fields shows that temperature distribution within the room in the case of floor heating was more uniform than with concentrated heating.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy and Buildings - Volume 78, August 2014, Pages 98-104
نویسندگان
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