کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7052914 1457461 2018 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Transient intrusion flow in a section-triangular attic
ترجمه فارسی عنوان
جریان نفوذ گذرا در یک اتاق زیر شیروانی مثلثی
کلمات کلیدی
جریان نفوذ، اتاق زیر شیروانی مثلثی، تجزیه و تحلیل مقیاس شبیه سازی عددی،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
Natural convection in an attic between the roof and the ceiling plays a role in the thermal performance of buildings. The intrusion flow on the ceiling originated from the cooling inclined roof due to buoyancy, which often appears during winter- or night-time and determines heat transfer through the ceiling, is studied using scaling analysis and numerical simulation. Seven regimes and four scenarios of different heat transfer and dynamic of the transient intrusion flow are presented. Scaling relations of the intrusion flow of different regimes and critical times of the transition between those regimes dependent on Rayleigh number (Ra), Prandtl number (Pr) and aspect ratio (A) are obtained. Based on numerical simulation, the selected velocity scales are validated. Furthermore, the development of natural convection flows and heat transfer in the section-triangular attic are characterized.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Communications in Heat and Mass Transfer - Volume 93, April 2018, Pages 11-20
نویسندگان
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