Abstract
The problem of the surface fluctuations in a settled granular material is posed. A simple model is given which describes the process by which a particle settles and comes to rest on the existing surface of the packing and from this a set of Langevin equations for the Fourier modes of the surface are derived. These equations imply that the Fourier amplitudes behave like the velocities of a set of independent Brownian particles. We show that this results in logarithmically divergent surface fluctuations if the flux of particles onto the surface is random, the divergence being removed by a more accurate description of the settling material, for example by having the granules fall through a sieve.
References
4
Referenced
1,336
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Dates
Type | When |
---|---|
Created | 18 years, 8 months ago (Dec. 15, 2006, 5:20 p.m.) |
Deposited | 4 years, 6 months ago (Feb. 21, 2021, 2:25 a.m.) |
Indexed | 2 weeks, 3 days ago (Aug. 6, 2025, 8:57 a.m.) |
Issued | 43 years, 3 months ago (May 8, 1982) |
Published | 43 years, 3 months ago (May 8, 1982) |
Published Online | 28 years, 7 months ago (Jan. 1, 1997) |
Published Print | 43 years, 3 months ago (May 8, 1982) |
@article{1982, volume={381}, ISSN={0080-4630}, url={http://dx.doi.org/10.1098/rspa.1982.0056}, DOI={10.1098/rspa.1982.0056}, number={1780}, journal={Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences}, publisher={The Royal Society}, year={1982}, month=may, pages={17–31} }