Numerical simulation of buoyant flow in a roof of triangular cross-section under winter day boundary conditions


Asan H., Namli L.

ENERGY AND BUILDINGS, vol.33, no.7, pp.753-757, 2001 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 33 Issue: 7
  • Publication Date: 2001
  • Doi Number: 10.1016/s0378-7788(01)00063-9
  • Title of Journal : ENERGY AND BUILDINGS
  • Page Numbers: pp.753-757

Abstract

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 10(3) to 10(6). 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. (C) 2001 Elsevier Science B.V. All rights reserved.