Numerical simulation of buoyant flow in a roof of triangular cross-section under winter day boundary conditions
Energy and Buildings, cilt.33, sa.7, ss.753-757, 2001 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 33 Sayı: 7
- Basım Tarihi: 2001
- Doi Numarası: 10.1016/s0378-7788(01)00063-9
- Dergi Adı: Energy and Buildings
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.753-757
- Anahtar Kelimeler: Heat transfer, Natural convection, Roof
- Ondokuz Mayıs Üniversitesi Adresli: Hayır
Özet
A computational study of buoyant flow in a roof of triangular cross-section has been carried out for the two-dimensional laminar natural convection under winter day boundary conditions. Stream function-vorticity formulation cooperated with control volume integration solution technique is adopted in this study. Steady-state solutions have been obtained for Rayleigh number ranging from 103 to 106. The effects of height-base ratio and Rayleigh number on the flow structure and heat transfer are investigated. The results show that height-base ratio and Rayleigh number have a profound influence on the temperature and flow field. As the Rayleigh number is increased, a multiple cell solution is developed between hypotenuse and base wall. The transition to the multiple cell solution depends on the Rayleigh number and height-base ratio. The results of heat transfer are also presented. © 2001 Elsevier Science B.V. All rights reserved.