Akademik Veri Yönetim Sistemi
3rd INTERNATIONAL CONFERENCE on MATHEMATICAL ADVANCES and APPLICATIONS (ICOMAA2020), İstanbul, Türkiye, 24 - 27 Haziran 2020, ss.159, (Özet Bildiri)
Factory buildings, shopping centers, stations, theaters etc are typical examples of domical roofed structures where two-dimensional analysis is valid. In this study transient buoyancy driven natural convection heat transfer and the turbulent air flow in domical roofed enclosures is numerically investigated. The Rayleigh number range accepted in two-dimensional analyzes is 108≤Ra≤1013. The aspect ratio, H/L, is defined as the ratio of the lateral face height to the base face length of the structure and it is considered equal to 1. The aspect ratio, h/H, is defined as the ratio of the dome height to the lateral face height of the structure and it is accepted equal to 0.5 in this study. Two lateral surfaces of the enclosure are heated while the domical surface is cooled. The bottom surface is considered adiabatic. The hot and cold surfaces are considered isothermal. The related governing equations are solved using Ansys Fluent 2020 R1 software. The RNG k- turbulence model and the Boussineq approximation modeling the buoyancy flow are used. The streamlines and isotherms in the enclosure are presented for all the Ra numbers studied. The mean Nusselt number is evaluated over the isothermal cold wall, and the results are compared with respect to the Rayleigh numbers studied.