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Linear and nonlinear wave propagation in booming sand dunes

Vriend, N. M. and Hunt, M. L. and Clayton, R. W. (2015) Linear and nonlinear wave propagation in booming sand dunes. Physics of Fluids, 27 (10). Art. No. 103305. ISSN 1070-6631. http://resolver.caltech.edu/CaltechAUTHORS:20151204-103416664

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Abstract

The 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.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1063/1.4931971DOIArticle
http://scitation.aip.org/content/aip/journal/pof2/27/10/10.1063/1.4931971PublisherArticle
ftp://ftp.aip.org/epaps/phys_fluids/E-PHFLE6-27-012510PublisherSupplementary Files
ORCID:
AuthorORCID
Clayton, R. W.0000-0003-3323-3508
Additional Information:© 2015 AIP Publishing LLC. Received 20 March 2015; accepted 14 September 2015; published online 27 October 2015. The 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. Raw data supporting Figures 1, 3–8, and 10 are available in the supplementary material.
Group:Seismological Laboratory
Funders:
Funding AgencyGrant Number
Pieter Langerhuizen Lambertuszoon FondsUNSPECIFIED
Record Number:CaltechAUTHORS:20151204-103416664
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20151204-103416664
Official Citation:Linear and nonlinear wave propagation in booming sand dunes Vriend, N. M. and Hunt, M. L. and Clayton, R. W., Physics of Fluids, 27, 103305 (2015), DOI:http://dx.doi.org/10.1063/1.4931971
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:62614
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:07 Dec 2015 16:28
Last Modified:31 Jan 2017 20:38

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