https://doi.org/10.1007/s100510050018
Dynamics of spatio-temporal defects in the Taylor-Dean system
Laboratoire de Mécanique, Université du Havre, BP 540, 76058 Le Havre Cedex,
France
Corresponding author: a mutabazi@cher.univ-lehavre.fr
Received:
23
February
1999
Revised:
26
May
1999
Published online: 15 January 2000
The dynamics of defects in a pattern of traveling inclined rolls has been investigated. Two regimes were identified in the neighborhood of defects: a diffusive regime, with a negative phase diffusion coefficient, and a coalescence regime in which the phase gradient diverges in time following a power law behavior. The observed periodic nucleation of defects is related to the frequency inhomogeneity induced by the disymmetry of the wave amplitude. Amplitude holes have been observed in the secondary modulated pattern.
PACS: 47.20.-k – Hydrodynamic stability / 47.20.Lz – Secondary instability / 47.54.+r – Pattern selection; pattern formation
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2000
