Vis enkel innførsel

dc.contributor.authorZheng, Zibo
dc.contributor.authorLi, Yan
dc.contributor.authorEllingsen, Simen Ådnøy
dc.date.accessioned2024-09-24T12:39:39Z
dc.date.available2024-09-24T12:39:39Z
dc.date.created2024-07-02T21:26:12Z
dc.date.issued2024
dc.identifier.issn2523-367X
dc.identifier.urihttps://hdl.handle.net/11250/3154005
dc.description.abstractContinuing our recent work [Ellingsen et al., Water Waves (2024)] we investigate the influence of vertically sheared currents on the surface elevation as well as the kinematics of dispersively focusing wave groups up to second order in steepness. The groups are assumed long crested in deep water which may travel at oblique angles with the current, which has a depth-dependent profile in both magnitude and direction. A strong but realistic shear current affects the wave surface elevation only slightly but the wave-induced horizontal velocity beneath the point of focus is very significantly affected, and new phenomena occur at second order. Firstly, a shear current causes wave-induced superharmonic velocity to be nonzero, contributing significantly for moderate wave steepness. At linear order, following (opposing) shear causes horizontal velocities to be amplified (reduced); for crest-focused wave groups, the superharmonic contribution reduces the influence of shear, whereas for trough-focused waves the velocity change from linear and second-order waves add, causing a substantially larger shear-induced effect. Secondly, the sub-harmonic mean flow is not strictly a return flow, but can follow the direction of wave propagation at the depths nearest the surface. Thirdly, unlike the case without shear where the subharmonic mean flow vanishes in the limit of zero bandwidth, it can now tend to a finite value in the narrowband limit. The criterion for this to happen is that the shear current has nonzero curvature.en_US
dc.language.isoengen_US
dc.publisherSpringeren_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no*
dc.subjectMiljøfluidmekanikken_US
dc.subjectEnvironmental fluid mechanicsen_US
dc.subjectHavbølgeren_US
dc.subjectOcean wavesen_US
dc.subjectFluidmekanikken_US
dc.subjectFluid mechanicsen_US
dc.titleDispersive Wave Focusing on a Shear Current: Part 2—Nonlinear Effectsen_US
dc.typeJournal articleen_US
dc.typePeer revieweden_US
dc.description.versionpublishedVersionen_US
dc.rights.holderCopyright 2024 The Author(s)en_US
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1
dc.identifier.doihttps://doi.org/10.1007/s42286-024-00097-z
dc.identifier.cristin2280628
dc.source.journalWater Wavesen_US
dc.source.pagenumber413–449en_US
dc.relation.projectEU – Horisont Europa (EC/HEU): 101045299en_US
dc.relation.projectNorges forskningsråd: 287398en_US
dc.relation.projectNorges forskningsråd: 342480en_US
dc.relation.projectNorges forskningsråd: 325114en_US
dc.subject.nsiVDP::Fysikk: 430en_US
dc.subject.nsiVDP::Physics: 430en_US
dc.identifier.citationWater Waves. 2024, 6, 413–449.en_US
dc.source.volume6en_US


Tilhørende fil(er)

Thumbnail

Denne innførselen finnes i følgende samling(er)

Vis enkel innførsel

Navngivelse 4.0 Internasjonal
Med mindre annet er angitt, så er denne innførselen lisensiert som Navngivelse 4.0 Internasjonal