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https://hdl.handle.net/2440/17749
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Type: | Journal article |
Title: | Oscillatory pattern formation with a conserved quantity |
Author: | Winterbottom, D. M. Matthews, P. C. Cox, Stephen Michael |
Citation: | Nonlinearity, 2005; 18(3):1031-1056 |
Publisher: | IOP Publishing Ltd |
Issue Date: | 2005 |
ISSN: | 0951-7715 |
School/Discipline: | School of Mathematical Sciences |
Statement of Responsibility: | D M Winterbottom, P C Matthews and S M Cox |
Abstract: | The influence of a conserved quantity on an oscillatory pattern-forming instability is examined in one space dimension. Amplitude equations are derived which are not only generic for systems with a pseudoscalar conserved quantity (e.g. rotating convection, magnetoconvection) but also applicable to systems with a scalar conserved quantity. The stability properties of both travelling and standing waves are analysed, with particular progress being possible in the limit of long-wavelength perturbations. For both forms of waves, the corresponding modulational stability boundaries are significantly altered by the presence of the conserved quantity; also, new instabilities are generated. For general perturbations, the full stability regions are found numerically. Simulations of the nonlinear governing equations are performed using a pseudo-spectral code; a variety of stable attractors are thus found of varying degrees of complexity. Previously unseen, highly localized, solutions are observed. |
DOI: | 10.1088/0951-7715/18/3/006 |
Appears in Collections: | Mathematical Sciences publications |
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