Direct numerical simulation of transverse ripples. 2. Self‐similarity, bedform coarsening, and effect of neighboring structures
Coupled bed‐flow direct numerical simulations investigating the early stages of pattern formation and bedform (ripple) interactions were examined in a previous paper (Part 1), making use of the resolved flow field. In this paper (Part 2), we compare our results to published experimental data and pro...
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| مؤلفون آخرون: | , , , |
| التنسيق: | article |
| منشور في: |
2018
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| الوصول للمادة أونلاين: | http://hdl.handle.net/10725/11523 https://doi.org/10.1002/2017JF004399 http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2017JF004399 |
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| _version_ | 1864513489202053120 |
|---|---|
| author | Zgheib, N. |
| author2 | Fedele, J. J. Hoyal, D. C. J. D. Perillo, M. M. Balachandar, S. |
| author2_role | author author author author |
| author_facet | Zgheib, N. Fedele, J. J. Hoyal, D. C. J. D. Perillo, M. M. Balachandar, S. |
| author_role | author |
| dc.creator.none.fl_str_mv | Zgheib, N. Fedele, J. J. Hoyal, D. C. J. D. Perillo, M. M. Balachandar, S. |
| dc.date.none.fl_str_mv | 2018 2019-11-15T14:32:34Z 2019-11-15T14:32:34Z 2019-11-15 |
| dc.identifier.none.fl_str_mv | 2169-9011 http://hdl.handle.net/10725/11523 https://doi.org/10.1002/2017JF004399 Zgheib, N., Fedele, J. J., Hoyal, D. C. J. D., Perillo, M. M., & Balachandar, S. (2018). Direct numerical simulation of transverse ripples: 2. Self‐similarity, bedform coarsening, and effect of neighboring structures. Journal of Geophysical Research: Earth Surface, 123(3), 478-500. http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2017JF004399 |
| dc.language.none.fl_str_mv | en |
| dc.relation.none.fl_str_mv | Journal of Geophysical Research: Earth Surface |
| dc.rights.*.fl_str_mv | info:eu-repo/semantics/openAccess |
| dc.title.none.fl_str_mv | Direct numerical simulation of transverse ripples. 2. Self‐similarity, bedform coarsening, and effect of neighboring structures |
| dc.type.none.fl_str_mv | Article info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/article |
| description | Coupled bed‐flow direct numerical simulations investigating the early stages of pattern formation and bedform (ripple) interactions were examined in a previous paper (Part 1), making use of the resolved flow field. In this paper (Part 2), we compare our results to published experimental data and provide an extensive quantitative analysis of the bed using spectral analysis and two‐point correlations. The effect of the mobile rippled bed on the flow structure and turbulence is investigated locally (at specific streamwise locations) and over the entire computational domain. We show that developing ripples attain a self‐similar profile in both the shape and the corresponding bed shear stress. We demonstrate the importance of neighboring structures, especially upstream neighbors, on bedform dynamics in terms of the growth, decay, and speed of ripples. Finally, we examine the defect‐free interactions in the later stages of bed evolution, which primarily lead to wave coarsening. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | LAURepo_52d5adfeef8b0156ec1f29d0cc705afb |
| identifier_str_mv | 2169-9011 Zgheib, N., Fedele, J. J., Hoyal, D. C. J. D., Perillo, M. M., & Balachandar, S. (2018). Direct numerical simulation of transverse ripples: 2. Self‐similarity, bedform coarsening, and effect of neighboring structures. Journal of Geophysical Research: Earth Surface, 123(3), 478-500. |
| language_invalid_str_mv | en |
| network_acronym_str | LAURepo |
| network_name_str | Lebanese American University repository |
| oai_identifier_str | oai:laur.lau.edu.lb:10725/11523 |
| publishDate | 2018 |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| spelling | Direct numerical simulation of transverse ripples. 2. Self‐similarity, bedform coarsening, and effect of neighboring structuresZgheib, N.Fedele, J. J.Hoyal, D. C. J. D.Perillo, M. M.Balachandar, S.Coupled bed‐flow direct numerical simulations investigating the early stages of pattern formation and bedform (ripple) interactions were examined in a previous paper (Part 1), making use of the resolved flow field. In this paper (Part 2), we compare our results to published experimental data and provide an extensive quantitative analysis of the bed using spectral analysis and two‐point correlations. The effect of the mobile rippled bed on the flow structure and turbulence is investigated locally (at specific streamwise locations) and over the entire computational domain. We show that developing ripples attain a self‐similar profile in both the shape and the corresponding bed shear stress. We demonstrate the importance of neighboring structures, especially upstream neighbors, on bedform dynamics in terms of the growth, decay, and speed of ripples. Finally, we examine the defect‐free interactions in the later stages of bed evolution, which primarily lead to wave coarsening.PublishedN/A2019-11-15T14:32:34Z2019-11-15T14:32:34Z20182019-11-15Articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article2169-9011http://hdl.handle.net/10725/11523https://doi.org/10.1002/2017JF004399Zgheib, N., Fedele, J. J., Hoyal, D. C. J. D., Perillo, M. M., & Balachandar, S. (2018). Direct numerical simulation of transverse ripples: 2. Self‐similarity, bedform coarsening, and effect of neighboring structures. Journal of Geophysical Research: Earth Surface, 123(3), 478-500.http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.phphttps://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2017JF004399enJournal of Geophysical Research: Earth Surfaceinfo:eu-repo/semantics/openAccessoai:laur.lau.edu.lb:10725/115232021-03-19T10:47:38Z |
| spellingShingle | Direct numerical simulation of transverse ripples. 2. Self‐similarity, bedform coarsening, and effect of neighboring structures Zgheib, N. |
| status_str | publishedVersion |
| title | Direct numerical simulation of transverse ripples. 2. Self‐similarity, bedform coarsening, and effect of neighboring structures |
| title_full | Direct numerical simulation of transverse ripples. 2. Self‐similarity, bedform coarsening, and effect of neighboring structures |
| title_fullStr | Direct numerical simulation of transverse ripples. 2. Self‐similarity, bedform coarsening, and effect of neighboring structures |
| title_full_unstemmed | Direct numerical simulation of transverse ripples. 2. Self‐similarity, bedform coarsening, and effect of neighboring structures |
| title_short | Direct numerical simulation of transverse ripples. 2. Self‐similarity, bedform coarsening, and effect of neighboring structures |
| title_sort | Direct numerical simulation of transverse ripples. 2. Self‐similarity, bedform coarsening, and effect of neighboring structures |
| url | http://hdl.handle.net/10725/11523 https://doi.org/10.1002/2017JF004399 http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2017JF004399 |