Direct numerical simulation of transverse ripples. 2. Self‐similarity, bedform coarsening, and effect of neighboring structures

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dc.contributor.author Zgheib, N.
dc.contributor.author Fedele, J. J.
dc.contributor.author Hoyal, D. C. J. D.
dc.contributor.author Perillo, M. M.
dc.contributor.author Balachandar, S.
dc.date.accessioned 2019-11-15T14:32:34Z
dc.date.available 2019-11-15T14:32:34Z
dc.date.copyright 2018 en_US
dc.date.issued 2019-11-15
dc.identifier.issn 2169-9011 en_US
dc.identifier.uri http://hdl.handle.net/10725/11523
dc.description.abstract 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. en_US
dc.language.iso en en_US
dc.title Direct numerical simulation of transverse ripples. 2. Self‐similarity, bedform coarsening, and effect of neighboring structures en_US
dc.type Article en_US
dc.description.version Published en_US
dc.author.school SOE en_US
dc.author.idnumber 201706684 en_US
dc.author.department Industrial And Mechanical Engineering en_US
dc.description.embargo N/A en_US
dc.relation.journal Journal of Geophysical Research: Earth Surface en_US
dc.journal.volume 123 en_US
dc.journal.issue 3 en_US
dc.article.pages 478-500 en_US
dc.keywords Direct numerical simulations en_US
dc.keywords Pattern formation en_US
dc.keywords Bedform interactions en_US
dc.keywords Coupled bed‐flow simulation en_US
dc.keywords Ripples en_US
dc.keywords Self‐similarity en_US
dc.identifier.doi https://doi.org/10.1002/2017JF004399 en_US
dc.identifier.ctation 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. en_US
dc.author.email nadim.zgheib@lau.edu.lb en_US
dc.identifier.tou http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php en_US
dc.identifier.url https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2017JF004399 en_US
dc.note This article is a companion to Zgheib et al. (2018) https://doi.org/10.1002/2017JF004398 en_US
dc.orcid.id https://orcid.org/0000-0002-1032-8005 en_US
dc.author.affiliation Lebanese American University en_US

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