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dc.contributor.authorVriend, Nathalieen
dc.contributor.authorHunt, MLen
dc.contributor.authorClayton, RWen
dc.date.accessioned2016-01-22T15:42:11Z
dc.date.available2016-01-22T15:42:11Z
dc.date.issued2015-10-27en
dc.identifier.citationPhysics of Fluids 2015, 27(10): 103305. doi:10.1063/1.4931971en
dc.identifier.issn1070-6631
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/253436
dc.description.abstractThe current field study examines linear and non-linear acoustic waves found in large desert sand dunes using field measurements of wave speed, frequency content, dispersion, and polarization. At the dune fields visited, an avalanching of sand can trigger a loud booming or rumbling sound with narrow peak frequencies centered between 70 and 105 Hz with higher harmonics. Prior to the onset of the nearly monotone booming, the emission consists of short bursts or burps of sound of smaller amplitude and over a significantly broader range of frequencies. These burps created at dune sites have similar frequency content to sounds generated by small-scale shearing in laboratory-scale experiments. By investigating the wave characteristics of both burping and booming emissions, this manuscript demonstrates that booming and burping correspond with the transmission of different waves within the dune. The burping sounds correspond to a surface Rayleigh wave with nonlinear and dispersive properties. The booming emission results from a linear, non-dispersive P-wave, which supports an earlier analysis where booming is modeled as the trapping of the body waves in the dune’s surficial layer. Besides characterizing the booming and burping emissions, this manuscript illustrates the effect of scale in the wave propagation of granular materials, when non-linear, dispersive waves across small scales transition to linear, non-dispersive waves across larger scales.
dc.description.sponsorshipThe authors would like to thank Dr. Chiara Daraio for the stimulating and fruitful discussions on wave propagation in a granular material. The help of Dr. Christopher Earls Brennen, Natalie Becerra, Dr. Angel Ruiz-Angulo, Dr. Erin Koos, and many others was essential during the field experiments at Dumont and Eureka Dunes. Travel and equipment support for N.M.V. was provided through funding from the Pieter Langerhuizen Lambertuszoon Fonds.
dc.languageEnglishen
dc.language.isoenen
dc.publisherAIP
dc.titleLinear and nonlinear wave propagation in booming sand dunesen
dc.typeArticle
dc.description.versionThis is the author accepted manuscript. The final version is available from AIP via http://dx.doi.org/10.1063/1.4931971en
prism.number103305en
prism.publicationDate2015en
prism.publicationNamePhysics of Fluidsen
prism.volume27en
rioxxterms.versionofrecord10.1063/1.4931971en
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2015-10-27en
dc.contributor.orcidVriend, Nathalie [0000-0002-1456-2317]
dc.identifier.eissn1089-7666
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idNERC (NE/I021047/1)


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