MODELING OF ROUGH WALL BOUNDARY LAYERS WITH AN INTERMITTENCY TRANSPORT MODEL
The paper presents a new extension of the γ-Reθt model to account for both the laminar-turbulent transition and the surface roughness. The new modeling approach takes into account the pressure gradient, turbulence intensity and roughness height and density. In the transition region both the intermi...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Gdańsk University of Technology
2010-07-01
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| Series: | TASK Quarterly |
| Subjects: | |
| Online Access: | https://journal.mostwiedzy.pl/TASKQuarterly/article/view/1997 |
| _version_ | 1811306815972966400 |
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| author | WITOLD ELSNER PIOTR WARZECHA |
| author_facet | WITOLD ELSNER PIOTR WARZECHA |
| author_sort | WITOLD ELSNER |
| collection | DOAJ |
| description |
The paper presents a new extension of the γ-Reθt model to account for both the laminar-turbulent transition and the surface roughness. The new modeling approach takes into account the pressure gradient, turbulence intensity and roughness height and density. In the transition region both the intermittency transport equation and the momentum thickness Reynolds number Reθt transport equation, supplemented by the correlation of Stripf et al. (2009) suitable for rough wall boundary layers are used. An additional modification of the SST turbulence model allows for modeling a full turbulent boundary layer over surfaces with sand roughness. A comprehensive validation of the new method using transitional and fully turbulent test cases was performed. Flat plate data with a zero and non-zero pressure gradient test case as well as a high pressure turbine blade case were used for this purpose. The studies proved that the new modeling approach appeared to be sufficiently precise and enabled a qualitative prediction of the boundary layer development for the tested flow configurations.
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| first_indexed | 2024-04-13T08:52:32Z |
| format | Article |
| id | doaj.art-9aaba9a6e44f4d9984cdd0e280777ca7 |
| institution | Directory Open Access Journal |
| issn | 1428-6394 |
| language | English |
| last_indexed | 2024-04-13T08:52:32Z |
| publishDate | 2010-07-01 |
| publisher | Gdańsk University of Technology |
| record_format | Article |
| series | TASK Quarterly |
| spelling | doaj.art-9aaba9a6e44f4d9984cdd0e280777ca72022-12-22T02:53:27ZengGdańsk University of TechnologyTASK Quarterly1428-63942010-07-01143MODELING OF ROUGH WALL BOUNDARY LAYERS WITH AN INTERMITTENCY TRANSPORT MODELWITOLD ELSNER0PIOTR WARZECHA1Czestochowa University of Technology, Institute of Thermal MachineryCzestochowa University of Technology, Institute of Thermal Machinery The paper presents a new extension of the γ-Reθt model to account for both the laminar-turbulent transition and the surface roughness. The new modeling approach takes into account the pressure gradient, turbulence intensity and roughness height and density. In the transition region both the intermittency transport equation and the momentum thickness Reynolds number Reθt transport equation, supplemented by the correlation of Stripf et al. (2009) suitable for rough wall boundary layers are used. An additional modification of the SST turbulence model allows for modeling a full turbulent boundary layer over surfaces with sand roughness. A comprehensive validation of the new method using transitional and fully turbulent test cases was performed. Flat plate data with a zero and non-zero pressure gradient test case as well as a high pressure turbine blade case were used for this purpose. The studies proved that the new modeling approach appeared to be sufficiently precise and enabled a qualitative prediction of the boundary layer development for the tested flow configurations. https://journal.mostwiedzy.pl/TASKQuarterly/article/view/1997surface roughnessboundary layerturbulencetransition modeling |
| spellingShingle | WITOLD ELSNER PIOTR WARZECHA MODELING OF ROUGH WALL BOUNDARY LAYERS WITH AN INTERMITTENCY TRANSPORT MODEL TASK Quarterly surface roughness boundary layer turbulence transition modeling |
| title | MODELING OF ROUGH WALL BOUNDARY LAYERS WITH AN INTERMITTENCY TRANSPORT MODEL |
| title_full | MODELING OF ROUGH WALL BOUNDARY LAYERS WITH AN INTERMITTENCY TRANSPORT MODEL |
| title_fullStr | MODELING OF ROUGH WALL BOUNDARY LAYERS WITH AN INTERMITTENCY TRANSPORT MODEL |
| title_full_unstemmed | MODELING OF ROUGH WALL BOUNDARY LAYERS WITH AN INTERMITTENCY TRANSPORT MODEL |
| title_short | MODELING OF ROUGH WALL BOUNDARY LAYERS WITH AN INTERMITTENCY TRANSPORT MODEL |
| title_sort | modeling of rough wall boundary layers with an intermittency transport model |
| topic | surface roughness boundary layer turbulence transition modeling |
| url | https://journal.mostwiedzy.pl/TASKQuarterly/article/view/1997 |
| work_keys_str_mv | AT witoldelsner modelingofroughwallboundarylayerswithanintermittencytransportmodel AT piotrwarzecha modelingofroughwallboundarylayerswithanintermittencytransportmodel |