Limit cycles in the presence of convection, a travelling wave analysis

Details Limit cycles in the presence of convection, a travelling wave analysis Limit cycles in the presence of convection, a travelling wave analysis

2007-05-04

arxiv.org/abs/0705.0719v2

Mathematics

Analysis of PDEs

20 pages, 5 figures

Scientific paper

10.1103/PhysRevE.76.036216

We consider a diffusion model with limit cycle reaction functions, in the presence of convection. We select a set of functions derived from a realistic reaction model: the Schnakenberg equations. This resultant form is unsymmetrical. We find a transformation which maps the irregular equations into model form. Next we transform the dependent variables into polar form. From here, a travelling wave analysis is performed on the radial variable. Results are complex, but we make some simple estimates. We carry out numerical experiments to test our analysis. An initial `knock' starts the propagation of pattern. The speed of the travelling wave is not quite as expected. We investigate further. The system demonstrates distinctly different behaviour to the left and the right. We explain how this phenomenon occurs by examining the underlying behaviour.

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