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Effect of spatial r...
Effect of spatial resolution of rough surfaces on numerically computed flow fields with application to hydraulic engineering
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- Andersson, Anders G. (author)
- Luleå tekniska universitet,Strömningslära och experimentell mekanik
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- Hellström, J. Gunnar I. (author)
- Luleå tekniska universitet,Strömningslära och experimentell mekanik
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- Andreasson, Patrik (author)
- Luleå tekniska universitet,Strömningslära och experimentell mekanik
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- Lundström, T. Staffan (author)
- Luleå tekniska universitet,Strömningslära och experimentell mekanik
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(creator_code:org_t)
- 2014-11-19
- 2014
- English.
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In: Engineering Applications of Computational Fluid Mechanics. - : Informa UK Limited. - 1994-2060 .- 1997-003X. ; 8:3, s. 373-381
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- In numerical simulations of flow over rough surfaces, the roughness is often not resolved but represented by a numerical model. The validity of such an assumption is investigated in this paper by Reynolds-Averaged Navier-Stokes simulations of flow over a surface with a large roughness. The surface was created from a high-resolution laser scanning of a real rock blasted tunnel. By reducing the geometrical resolution of the roughness in two steps, the importance of an appropriate surface description could be examined. The flow fields obtained were compared to a set-up with a geometrical flat surface where the roughness was represented by a modified form of the Launder and Spalding wall-function. The flow field over the surface with the lowest resolution was substantially different from those of the two finer resolutions and rather close to the results from the set-up with the wall-function. The results also yield that the finer the resolution is the more vorticity is formed close to the rough surface and more turbulence is generated.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Strömningsmekanik och akustik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Fluid Mechanics and Acoustics (hsv//eng)
Keyword
- Strömningslära
- Fluid Mechanics
Publication and Content Type
- ref (subject category)
- art (subject category)
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