Comment on "Relevant Length Scale of Barchan Dunes"

Details Comment on "Relevant Length Scale of Barchan Dunes" Comment on "Relevant Length Scale of Barchan Dunes"

2003-05-10

arxiv.org/abs/cond-mat/0305229v2

Physics

Condensed Matter

Soft Condensed Matter

1 page, 1 eps-figure

Scientific paper

10.1103/PhysRevLett.93.039401

In a recent experimental breakthrough, Hersen et al. [1] demonstrated that by changing the agitating medium from air to water, one can obtain, on laboratory scale, dunes that are downsized copies of desert dunes, thereby overcoming a major obstacle for their systematic study. Here we argue in two steps (i),(ii) that an alternative data analysis leads to some conclusions that are qualitatively and quantitatively different from Hersen et al.'s but justify their similarity hypothesis on different grounds. [1] P. Hersen, S. Douady, and B. Andreotti, Phys. Rev. Lett. 89 (2002) 264301

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