Analysis of the flow and thermal fields in bobtail roofs heated from the base wall
المؤلف
المصدر
The Iraqi Journal for Mechanical and Materials Engineering
العدد
المجلد 22، العدد 1 (31 مارس/آذار 2022)، ص ص. 1-15، 15ص.
الناشر
تاريخ النشر
2022-03-31
دولة النشر
العراق
عدد الصفحات
15
التخصصات الرئيسية
الموضوعات
الملخص EN
Analysis of airflow and thermal characteristics of attics of bobtail-shaped pitched roofs heated through a horizontally suspended ceiling is numerically carried out in this study.
pitch angles of 14°, 18°, 30°, and 45° within the standard pitch roof range are selected.
the configuration falls within rayleigh number 3.19 105 ≤ Ra ≤ 2.04 107.
a finite-volume CFD code was used to solve the mass, momentum, and energy conservation equations governing the problem.
the results obtained indicate a strong influence on the shape and angle of the roof.
at lower roof pitches, the flow field is characterized by multiple counter-rotating vortices asymmetrically arranged within the enclosures.
eight cells in the 14° enclosure were reduced to five in the 45° roof pitch.
the size and rotating strength of a vortex increase from the left corner to the middle of the enclosures.
at higher pitch angles, the vertical wall obstructed the flow leading to a number of distorted cells.
the maximum velocity within the aerodynamic boundary layer along the base wall occurs at Y = 0.02 with the values U = 0.013 and U = 0.028 in the 14° and 45° enclosures respectively.
the thermal field portrays a convection system of rising hot plumes from the base wall and descending cold jets from the inclined walls ; all enclosed by thin boundary layers along the walls.
graphical plots of velocity and temperature variations along some cross-sections within the enclosures enable the prediction of some important heat and flow parameters.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Kamiyu, Ula. 2022. Analysis of the flow and thermal fields in bobtail roofs heated from the base wall. The Iraqi Journal for Mechanical and Materials Engineering،Vol. 22, no. 1, pp.1-15.
https://search.emarefa.net/detail/BIM-1338751
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Kamiyu, Ula. Analysis of the flow and thermal fields in bobtail roofs heated from the base wall. The Iraqi Journal for Mechanical and Materials Engineering Vol. 22, no. 1 (Mar. 2022), pp.1-15.
https://search.emarefa.net/detail/BIM-1338751
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Kamiyu, Ula. Analysis of the flow and thermal fields in bobtail roofs heated from the base wall. The Iraqi Journal for Mechanical and Materials Engineering. 2022. Vol. 22, no. 1, pp.1-15.
https://search.emarefa.net/detail/BIM-1338751
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references : p. 13-15
رقم السجل
BIM-1338751
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
تقوم هذه الخدمة بالتحقق من التشابه أو الانتحال في الأبحاث والمقالات العلمية والأطروحات الجامعية والكتب والأبحاث باللغة العربية، وتحديد درجة التشابه أو أصالة الأعمال البحثية وحماية ملكيتها الفكرية. تعرف اكثر