Antidune simulations using continuum-based models

Simple item page
dc.catalogadorjlo
dc.contributor.authorEscauriaza Mesa, Cristián Rodrigo
dc.contributor.authorWilliams, Megan Elizabeth
dc.date.accessioned2025-07-18T15:36:47Z
dc.date.available2025-07-18T15:36:47Z
dc.date.issued2024
dc.description.abstractThe interactions of supercritical flows with sand or gravel beds in river channels or tidal inlets lead to the formation of antidunes. These bedforms are generally identified as nearly periodic sedimentary patterns of symmetrical shape that are in phase with the surface waves in the flow and have important effects on flow resistance and bedload transport. In addition, they play a fundamental role on morphodynamical processes in estuarine systems, on the scour around hydraulic infrastructure, and their bed signature can help to interpret paleofloods from sedimentary records. Despite the importance and ubiquity of antidunes in environmental flows, very few numerical simulations have captured their dynamics. In this work, we develop a model that couples the shallow-water and Exner equations in two-dimensions (2D) and demonstrate that a higher-level theory can reproduce the experimental antidune results of Pascal et al. (2021), independent of interactions at the particle scale. The flows are characterised by Froude numbers between 1.31 and 1.45, sediment diameters of d50=2.9$$ {d}_{50}=2.9 $$ mm and with 3 degrees mean bed slopes. Using this information, we aim to identify the minimum requirements for a numerical model to capture in detail the migration of these bedforms. We use spectral analysis and compute statistics of bed elevation to determine the relevant temporal and spatial scales associated to the antidune propagation. The results of the model yield new insights on the mechanisms of bedform migration, providing tools to improve their description and assess the morphodynamic feedbacks.
dc.description.funderOffice of Naval Research Global
dc.format.extent10 páginas
dc.fuente.origenWOS
dc.fuente.origenSCOPUS
dc.identifier.doi10.1002/esp.6058
dc.identifier.eissn1096-9837
dc.identifier.issn0197-9337
dc.identifier.urihttps://doi.org/10.1002/esp.6058
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/104954
dc.identifier.wosidWOS:001388352500001
dc.information.autorucEscuela de Ingeniería; Escauriaza Mesa, Cristián Rodrigo; 0000-0001-5275-8364; 3857
dc.information.autorucS/I; Williams, Megan Elizabeth; S/I; 1167646
dc.language.isoen
dc.nota.accesocontenido parcial
dc.revistaEarth surface processes and landforms
dc.rightsacceso restringido
dc.subjectAntidunes
dc.subjectBedforms
dc.subjectMorphodynamic models
dc.subject.ddc550
dc.subject.deweyCiencias de la tierraes_ES
dc.subject.ods06 Clean water and sanitation
dc.subject.odspa06 Agua limpia y saneamiento
dc.titleAntidune simulations using continuum-based models
dc.typeartículo
dc.volumen50
sipa.codpersvinculados3857
sipa.codpersvinculados1167646
sipa.trazabilidadWOS;2025-01-11
sipa.trazabilidadSCOPUS;2025-01-05
Files
Collections
Artículos de revistas