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Title: Sound From Sand
Authors: Tan, Danielle
Keywords: granular material
sound production
kinetic theory
Issue Date: 31-Jan-2012
Abstract: Various methods of producing sound from 'sounding' sand in the laboratory are explored. Low amplitude sound with frequency similar to that of 'booming' during spontaneous avalanches was produced in a small inclined chute and rotating flask. Shearing of dried sand with a stylus, and pouring from buckets or shaking in a jar produced loud sound in 200-500Hz range. Dryness of the sand and flowrate have significant effect on the produced sound. A model based on kinetic theory is proposed to explain the production of oscillations in avalanching flows. The avalanching layer behaves like a breathing mode with infinite wavelength, and perturbations in volume fraction allow oscillatory behaviour to be sustained in the inclined shear flow. Finally, a phase transition model is used to explain the presence, and characteristics, of oscillations observed in numerical simulations of inclined flows near their stopping angle.
Committee Chair: Jenkins, James Thomas
Committee Member: Sachse, Wolfgang H
Cohen, Itai
Discipline: Theoretical & Appl Mechanics
Degree Name: Ph.D. of Theoretical & Appl Mechanics
Degree Level: Doctor of Philosophy
Degree Grantor: Cornell University
No Access Until: 2017-06-01
Appears in Collections:Cornell Theses and Dissertations

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