Numerical modelling of multiple scattering between two elastical particles

Irina Bjørnø, Leif Bjørnø Jensen

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    Abstract

    Multiple acoustical signal interactions with sediment particles in the vicinity of the seabed may significantly change the course of sediment concentration profiles determined by inversion from acoustical backscattering measurements. The scattering properties of high concentrations of sediments in suspension have been studied extensively since Foldy's formulation of his theory for isotropic scattering by randomly distributed scatterers. However, a number of important problems related to multiple scattering are still far from finding their solutions. A particular, but still unsolved, problem is the question of proximity thresholds for influence of multiple scattering in terms of particle properties like volume fraction, average distance between particles or other related parameters. A few available experimental data indicate a significance of multiple scattering in suspensions where the concentration is higher than 20 g/l of sand particles. This paper reports an attempt to illuminate and to solve the proximity threshold question, by an in-depth numerical study of the interaction of ultrasonic signals with two canonically shaped elastic particles. Introductory experimental results seem to create evidence for the applicability of this new numerical model
    Original languageEnglish
    Title of host publicationOCEANS '98 Conference Proceedings
    Volume2
    PublisherIEEE
    Publication date1998
    Pages598-602
    ISBN (Print)0-7803-5045-6
    DOIs
    Publication statusPublished - 1998
    EventOCEANS '98 Conference -
    Duration: 1 Jan 1998 → …

    Conference

    ConferenceOCEANS '98 Conference
    Period01/01/1998 → …

    Bibliographical note

    Copyright: 1998 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE

    Cite this

    Bjørnø, I., & Jensen, L. B. (1998). Numerical modelling of multiple scattering between two elastical particles. In OCEANS '98 Conference Proceedings (Vol. 2, pp. 598-602). IEEE. https://doi.org/10.1109/OCEANS.1998.724309
    Bjørnø, Irina ; Jensen, Leif Bjørnø. / Numerical modelling of multiple scattering between two elastical particles. OCEANS '98 Conference Proceedings. Vol. 2 IEEE, 1998. pp. 598-602
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    abstract = "Multiple acoustical signal interactions with sediment particles in the vicinity of the seabed may significantly change the course of sediment concentration profiles determined by inversion from acoustical backscattering measurements. The scattering properties of high concentrations of sediments in suspension have been studied extensively since Foldy's formulation of his theory for isotropic scattering by randomly distributed scatterers. However, a number of important problems related to multiple scattering are still far from finding their solutions. A particular, but still unsolved, problem is the question of proximity thresholds for influence of multiple scattering in terms of particle properties like volume fraction, average distance between particles or other related parameters. A few available experimental data indicate a significance of multiple scattering in suspensions where the concentration is higher than 20 g/l of sand particles. This paper reports an attempt to illuminate and to solve the proximity threshold question, by an in-depth numerical study of the interaction of ultrasonic signals with two canonically shaped elastic particles. Introductory experimental results seem to create evidence for the applicability of this new numerical model",
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    Bjørnø, I & Jensen, LB 1998, Numerical modelling of multiple scattering between two elastical particles. in OCEANS '98 Conference Proceedings. vol. 2, IEEE, pp. 598-602, OCEANS '98 Conference, 01/01/1998. https://doi.org/10.1109/OCEANS.1998.724309

    Numerical modelling of multiple scattering between two elastical particles. / Bjørnø, Irina; Jensen, Leif Bjørnø.

    OCEANS '98 Conference Proceedings. Vol. 2 IEEE, 1998. p. 598-602.

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

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    Bjørnø I, Jensen LB. Numerical modelling of multiple scattering between two elastical particles. In OCEANS '98 Conference Proceedings. Vol. 2. IEEE. 1998. p. 598-602 https://doi.org/10.1109/OCEANS.1998.724309