31 Oct 2020
31 Oct 2020
Particle size dynamics in abrading pebble populations
- 1MTA-BME Morphodynamics Research Group Budapest University of Technology and Economics, Műegyetem rakpart 1-3, Budapest, Hungary
- 2Department of Materials and Structures, Budapest University of Technology and Economics, Műegyetem rakpart 1-3, Budapest, Hungary
- 3Department of Theoretical Physics, Budapest University of Technology and Economics, Budafoki út 8, Budapest, Hungary
- 1MTA-BME Morphodynamics Research Group Budapest University of Technology and Economics, Műegyetem rakpart 1-3, Budapest, Hungary
- 2Department of Materials and Structures, Budapest University of Technology and Economics, Műegyetem rakpart 1-3, Budapest, Hungary
- 3Department of Theoretical Physics, Budapest University of Technology and Economics, Budafoki út 8, Budapest, Hungary
Abstract. Abrasion of sedimentary particles in fluvial and aeolian environments is widely associated with collisions encountered by the particle. Although the physics of abrasion is complex, purely geometric models recover the course of mass and shape evolution of individual particles in low and middle energy environments (in the absence of fragmentation) remarkably well. In this paper, utilizing results of this individual, geometric abrasion theory as a collision kernel, following techniques adopted in the statistical theory of coagulation and fragmentation, we construct the corresponding Fokker-Planck equation as the first model for the collision-driven collective mass evolution of sedimentary particles. Our model uncovers a startling fundamental feature of collective particle size dynamics: collisional abrasion may, depending on the energy level, either focus size distributions, thus enhancing the effects of size selective transport or it may act in the opposite direction by dispersing the distribution. This complex behaviour fits geological observations on mass distributions.
András A. Sipos et al.


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SC1: 'Review of Sipos et al.', David J. Furbish, 02 Nov 2020
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AC1: 'Reply', Andras A Sipos, 10 Nov 2020
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AC1: 'Reply', Andras A Sipos, 10 Nov 2020
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RC1: 'Comments to Manuscript esurf-2020-84', Duccio Bertoni, 03 Dec 2020
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AC2: 'Reply', Andras A Sipos, 04 Dec 2020
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AC2: 'Reply', Andras A Sipos, 04 Dec 2020
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RC2: 'Review of "Particle size dynamics in abrading pebble populations"', Sebastien Carretier, 10 Dec 2020


-
SC1: 'Review of Sipos et al.', David J. Furbish, 02 Nov 2020
-
AC1: 'Reply', Andras A Sipos, 10 Nov 2020
-
AC1: 'Reply', Andras A Sipos, 10 Nov 2020
-
RC1: 'Comments to Manuscript esurf-2020-84', Duccio Bertoni, 03 Dec 2020
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AC2: 'Reply', Andras A Sipos, 04 Dec 2020
-
AC2: 'Reply', Andras A Sipos, 04 Dec 2020
-
RC2: 'Review of "Particle size dynamics in abrading pebble populations"', Sebastien Carretier, 10 Dec 2020
András A. Sipos et al.
András A. Sipos et al.
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