In English

The Influence of Natural and Forced Convection in Attics – A CFD Analysis

Andreas Bengtson ; Victor Fransson
Göteborg : Chalmers tekniska högskola, 2014. Examensarbete - Institutionen för bygg- och miljöteknik, Chalmers tekniska högskola; 2014:155, 2014.
[Examensarbete på avancerad nivå]

In this thesis project, the air and heat flow in a principal insulated cold attic model has been numerically investigated through the use of the commercial CFD software ANSYS Fluent. A numerical model for the heat transfer has been developed and verified with experiments on a simple box model containing insulation and an overlying horizontal air cavity. This numerical model was then applied on a cold attic model with insulation and wooden joists. Both situations with pure natural convection, caused by the temperature difference between the hot floor of the attic and the cold roof, as well as situations where the attic in addition was exposed to forced convection in the form of attic ventilation has been investigated. This project has been a collaboration between ÅF Industry AB and the Division of Building Technology at Chalmers University of Technology.

Nyckelord: Computational Fluid Dynamics, CFD, Building Physics, Heat transfer, Porous Media, Natural Convection, Forced Convection, Cold Attics



Publikationen registrerades 2015-04-17. Den ändrades senast 2015-05-15

CPL ID: 215318

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