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- Shankar, VijayLuleå tekniska universitet,Drift, underhåll och akustik (author)
Numerical analysis of the influence of natural convection in attics - A CFD analysis
- Article/chapterEnglish2018
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- Author(s),2018
- electronicrdacarrier
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- LIBRIS-ID:oai:research.chalmers.se:74ec88c9-f134-41d5-a67f-3bd5a39ebe58
- https://doi.org/10.1063/1.5044080DOI
- https://research.chalmers.se/publication/506287URI
- https://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-70250URI
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- Language:English
- Summary in:English
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- AIP Conference Proceedings ;1978:1
Notes
- As the design of the building envelope has changed, the parameters that govern thermal insulation, air tightness and the complex heat transfer processes are often neglected. This aim of this research work is to numerically investigate the influence of natural convection in attics with joists and insulation. With the help of Computational Fluid Dynamics (CFD), more specifically the software ANSYS Fluent, 3D simulations are conducted for both porous layer and air cavity to estimate the magnitude of heat transfer. The same was executed for porous media with two different values of permeability. A suitable turbulence model has been applied to account for the highly sensitive buoyancy driven flow. The results are presented in form of dimensionless numbers, Nusselt number versus modified Rayleigh number. It can be concluded that the temperature difference and permeability play a vital role.
Subject headings and genre
- TEKNIK OCH TEKNOLOGIER Maskinteknik Energiteknik hsv//swe
- ENGINEERING AND TECHNOLOGY Mechanical Engineering Energy Engineering hsv//eng
- TEKNIK OCH TEKNOLOGIER Maskinteknik Strömningsmekanik och akustik hsv//swe
- ENGINEERING AND TECHNOLOGY Mechanical Engineering Fluid Mechanics and Acoustics hsv//eng
- TEKNIK OCH TEKNOLOGIER Samhällsbyggnadsteknik Husbyggnad hsv//swe
- ENGINEERING AND TECHNOLOGY Civil Engineering Building Technologies hsv//eng
- Fluid mechanics
- computational fluid dynamics (CFD)
- Building physics
- Heat Transfer
- Teknisk akustik
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- Bengtson, AndreasChalmers tekniska högskola,Chalmers University of Technology (author)
- Fransson, VictorChalmers tekniska högskola,Chalmers University of Technology (author)
- Hagentoft, Carl-Eric,1958Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)hagent (author)
- Luleå tekniska universitetDrift, underhåll och akustik (creator_code:org_t)
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- In:AIP Conference Proceedings: Author(s)19781551-76160094-243X
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