On the nature, formation and diversity of particulate coherent structures in microgravity conditions and their relevance to materials science and problems of astrophysical interest

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Lappa, Marcello (2016) On the nature, formation and diversity of particulate coherent structures in microgravity conditions and their relevance to materials science and problems of astrophysical interest. Geophysical and Astrophysical Fluid Dynamics, 110 (4). pp. 348-386. ISSN 1029-0419 (https://doi.org/10.1080/03091929.2016.1194410)

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Abstract

Different phenomena related to the spontaneous accumulation of solid particles dispersed in a fluid medium in microgravity conditions are discussed, with an emphasis on recent discoveries and potential links with the general field of astrophysical fluid-dynamics on the one hand, and with terrestrial applications in the field of materials science on the other hand. With special attention to the typical physical forces at play in such an environment, namely, surface-tension gradients, oscillatory residual gravity components, inertial disturbances and forces of an electrostatic nature, specific experimental and numerical examples are presented to provide inputs for an increased understanding of the underlying cause-and-effect relationships. Studying these systems can be seen as a matter of understanding how macroscopic scenarios arise from the cooperative behaviour of sub-parts or competing mechanisms (nonlinearities and interdependencies on various spatial and temporal scales). Through a critical assessment of the properties displayed by the resulting structures (which appear in the form of one-dimensional circuits formed by aligned particles, planar accumulation surfaces, three-dimensional compact structures resembling “quadrics”, micro-crystallites or fractal aggregates), we discuss a possible classification of the related particle attractors in the space of parameters according to the prevailing effect.

ORCID iDs

Lappa, Marcello ORCID logoORCID: https://orcid.org/0000-0002-0835-3420;
  • Item type:Article
    ID code:56555
    Dates:
    Date
    Event
    July 2016
    Published
    23 May 2016
    Accepted
    Notes:This is an Accepted Manuscript of an article published by Taylor & Francis in Geophysical and Astrophysical Fluid Dynamics on 24/06/2016, available online: http://www.tandfonline.com/10.1080/03091929.2016.1194410.
    Subjects:Science > Physics
    Department:Faculty of Engineering > Mechanical and Aerospace Engineering
    Depositing user: Pure Administrator
    Date deposited:27 May 2016 15:08
    Last modified:02 Dec 2024 02:12
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/56555
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