Publicação: The modulational instability in deep water under the action of wind and dissipation
dc.contributor.author | Kharif, C. | |
dc.contributor.author | Kraenkel, Roberto André [UNESP] | |
dc.contributor.author | Manna, M. A. | |
dc.contributor.author | Thomas, R. | |
dc.contributor.institution | Institut de Recherche sur les Phénomènes Hors Equilibre (IRPHE) | |
dc.contributor.institution | Universidade Estadual Paulista (Unesp) | |
dc.contributor.institution | Université Montpellier 2 | |
dc.date.accessioned | 2013-09-30T19:03:32Z | |
dc.date.accessioned | 2014-05-20T14:14:22Z | |
dc.date.available | 2013-09-30T19:03:32Z | |
dc.date.available | 2014-05-20T14:14:22Z | |
dc.date.issued | 2010-12-01 | |
dc.description.abstract | The modulational instability of gravity wave trains on the surface of water acted upon by wind and under influence of viscosity is considered. The wind regime is that of validity of Miles' theory and the viscosity is small. By using a perturbed nonlinear Schrodinger equation describing the evolution of a narrow-banded wavepacket under the action of wind and dissipation, the modulational instability of the wave group is shown to depend on both the frequency (or wavenumber) of the carrier wave and the strength of the friction velocity (or the wind speed). For fixed values of the water-surface roughness, the marginal curves separating stable states from unstable states are given. It is found in the low-frequency regime that stronger wind velocities are needed to sustain the modulational instability than for high-frequency water waves. In other words, the critical frequency decreases as the carrier wave age increases. Furthermore, it is shown for a given carrier frequency that a larger friction velocity is needed to sustain modulational instability when the roughness length is increased. | en |
dc.description.affiliation | Inst Rech Phenomenes Hors Equilibre, F-13384 Marseille 13, France | |
dc.description.affiliation | Univ Estadual Paulista, Inst Fis Teor, BR-01405900 São Paulo, Brazil | |
dc.description.affiliation | Univ Montpellier 2, CNRS, UMR 5207, Lab Phys Theor & Astroparticules, F-34095 Montpellier 05, France | |
dc.description.affiliationUnesp | Univ Estadual Paulista, Inst Fis Teor, BR-01405900 São Paulo, Brazil | |
dc.description.sponsorship | Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) | |
dc.format.extent | 138-149 | |
dc.identifier | http://dx.doi.org/10.1017/S0022112010004349 | |
dc.identifier.citation | Journal of Fluid Mechanics. New York: Cambridge Univ Press, v. 664, p. 138-149, 2010. | |
dc.identifier.doi | 10.1017/S0022112010004349 | |
dc.identifier.file | WOS000285472300007.pdf | |
dc.identifier.issn | 0022-1120 | |
dc.identifier.uri | http://hdl.handle.net/11449/24716 | |
dc.identifier.wos | WOS:000285472300007 | |
dc.language.iso | eng | |
dc.publisher | Cambridge University Press | |
dc.relation.ispartof | Journal of Fluid Mechanics | |
dc.relation.ispartofjcr | 2.893 | |
dc.relation.ispartofsjr | 1,591 | |
dc.rights.accessRights | Acesso aberto | |
dc.source | Web of Science | |
dc.subject | air/sea interactions | en |
dc.subject | surface gravity waves | en |
dc.subject | wind-wave interactions | en |
dc.title | The modulational instability in deep water under the action of wind and dissipation | en |
dc.type | Artigo | |
dcterms.license | http://journals.cambridge.org/action/displaySpecialPage?pageId=4676# | |
dcterms.rightsHolder | Cambridge Univ Press | |
dspace.entity.type | Publication | |
unesp.campus | Universidade Estadual Paulista (UNESP), Instituto de Física Teórica (IFT), São Paulo | pt |
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