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The Stability Balloon for Two-dimensional Vortex Ripple Patterns | | J. L. Hansen
; M. van Hecke
; C. Ellegaard
; K. H. Andersen
; T. Bohr
; A. Haaning
; T. Sams
; | | Date: |
22 Jun 2001 | | Subject: | Soft Condensed Matter; Disordered Systems and Neural Networks; Statistical Mechanics; Pattern Formation and Solitons | cond-mat.soft cond-mat.dis-nn cond-mat.stat-mech nlin.PS | | Abstract: | Patterns of vortex ripples form when a sand bed is subjected to an oscillatory fluid flow. Here we describe experiments on the response of regular vortex ripple patterns to sudden changes of the driving amplitude a or frequency f. A sufficient decrease of f leads to a "freezing" of the pattern, while a sufficient increase of f leads to a supercritical secondary "pearling" instability. Sufficient changes in the amplitude a lead to subcritical secondary "doubling" and "bulging" instabilities. Our findings are summarized in a "stability balloon" for vortex ripple pattern formation. | | Source: | arXiv, cond-mat/0106465 | | Services: | Forum | Review | PDF | Favorites | |
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