Thermal Behaviour of the Residential Buildings with Cantilever Beam under Winter Day Boundary Conditions

  • Lutfu Namli Ondokuz Mayis University Engineering Faculty Mechanical Engineering Department

Abstract

In this study, the thermal behaviour of the residential buildings with cantilever beam under winter day boundary conditions was investigated numerically by means of the open-ended structure approach. For this purpose, the parametric study has been realised for various ratios of cantilever beam depth/cantilever beam height (d/H) and Rayleigh numbers by using a computer program in case of no wind for laminar flow. Analyses were conducted for Rayleigh numbers which range from 10^3 and 10^6. The calculations were carried out for the ratios of d/H, namely 0.0, 0.2, 0.4, 0.6, 0.8 and 1.0. The working fluid was handled as air (Pr=0.71). According to the findings; the mean Nu number along with the outer vertical wall (surface L) of the residential building, in general, decreases with increasing of d/H. This decreasing in the mean Nu number is evident for Ra≤10^4, but after Ra=10^5, it appears to be more pronounced. To have minimum heat loss from the residential building under winter day boundary condition, it is suggested that the ratio of d/H not be over 0.5 and at least 0.2.

Keywords:

LOpen-ended structure; Extended boundaries; Cantilever beam; Laminar natural convection

DOI: 10.17350/HJSE19030000090

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Section
ENGINEERING