Improved version of LeMoS hybrid model for ambiguous grid densities
Application of the LeMoS hybrid (LH) URANS/LES method for the wake parameters prediction is considered. The wake fraction coefficient is calculated for inland ship model M1926 under shallow water conditions and compared to results of PIV measurements. It was shown that due to lack of the resolved tu...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Elsevier
2018-05-01
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| Series: | International Journal of Naval Architecture and Ocean Engineering |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2092678217300687 |
| _version_ | 1818927675673149440 |
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| author | I. Shevchuk N. Kornev |
| author_facet | I. Shevchuk N. Kornev |
| author_sort | I. Shevchuk |
| collection | DOAJ |
| description | Application of the LeMoS hybrid (LH) URANS/LES method for the wake parameters prediction is considered. The wake fraction coefficient is calculated for inland ship model M1926 under shallow water conditions and compared to results of PIV measurements. It was shown that due to lack of the resolved turbulence at the interface between LES and RANS zones the artificial grid induced separations can occur. In order to overcome this drawback, a shielding function is introduced into LH model. The new version of the model is compared to the original one, RANS k−ω SST and SST-IDDES models. It is demonstrated that the proposed modification is robust and capable of wake prediction with satisfactory accuracy. Keywords: Hybrid RANS/LES, Shallow water, Wake prediction, Wake unsteadiness |
| first_indexed | 2024-12-20T03:16:47Z |
| format | Article |
| id | doaj.art-b823b7535c8f4fca933cbb64e9807ee2 |
| institution | Directory Open Access Journal |
| issn | 2092-6782 |
| language | English |
| last_indexed | 2024-12-20T03:16:47Z |
| publishDate | 2018-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | International Journal of Naval Architecture and Ocean Engineering |
| spelling | doaj.art-b823b7535c8f4fca933cbb64e9807ee22022-12-21T19:55:19ZengElsevierInternational Journal of Naval Architecture and Ocean Engineering2092-67822018-05-01103270281Improved version of LeMoS hybrid model for ambiguous grid densitiesI. Shevchuk0N. Kornev1Corresponding author.; Chair of Modeling and Simulation, University of Rostock, 18057 Rostock, GermanyChair of Modeling and Simulation, University of Rostock, 18057 Rostock, GermanyApplication of the LeMoS hybrid (LH) URANS/LES method for the wake parameters prediction is considered. The wake fraction coefficient is calculated for inland ship model M1926 under shallow water conditions and compared to results of PIV measurements. It was shown that due to lack of the resolved turbulence at the interface between LES and RANS zones the artificial grid induced separations can occur. In order to overcome this drawback, a shielding function is introduced into LH model. The new version of the model is compared to the original one, RANS k−ω SST and SST-IDDES models. It is demonstrated that the proposed modification is robust and capable of wake prediction with satisfactory accuracy. Keywords: Hybrid RANS/LES, Shallow water, Wake prediction, Wake unsteadinesshttp://www.sciencedirect.com/science/article/pii/S2092678217300687 |
| spellingShingle | I. Shevchuk N. Kornev Improved version of LeMoS hybrid model for ambiguous grid densities International Journal of Naval Architecture and Ocean Engineering |
| title | Improved version of LeMoS hybrid model for ambiguous grid densities |
| title_full | Improved version of LeMoS hybrid model for ambiguous grid densities |
| title_fullStr | Improved version of LeMoS hybrid model for ambiguous grid densities |
| title_full_unstemmed | Improved version of LeMoS hybrid model for ambiguous grid densities |
| title_short | Improved version of LeMoS hybrid model for ambiguous grid densities |
| title_sort | improved version of lemos hybrid model for ambiguous grid densities |
| url | http://www.sciencedirect.com/science/article/pii/S2092678217300687 |
| work_keys_str_mv | AT ishevchuk improvedversionoflemoshybridmodelforambiguousgriddensities AT nkornev improvedversionoflemoshybridmodelforambiguousgriddensities |