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Competition between transport phenomena in a reaction–diffusion–convection system

Ciotti, Luigi and Budroni, Marcello Antonio and Masia, Marco and Marchettini, Nadia and Rustici, Mauro (2011) Competition between transport phenomena in a reaction–diffusion–convection system. Chemical Physics Letters, Vol. 512 (4-6), p. 290-296. eISSN 1873-4448. Article.

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DOI: 10.1016/j.cplett.2011.07.052

Abstract

A reaction–diffusion–convection (RDC) model is introduced as a convenient framework for studying instability scenarios by which chemical oscillators are driven to chaos. Distinct bifurcations in the oscillating patterns are found as diffusion coefficients or Grashof numbers are varied. Singularly there emerge peculiar bifurcation paths in which quasi-periodicity transmutes into a period-doubling sequence to chemical chaos. The opposite influence exhibited by the two parameters in these transitions clearly indicate that diffusion and natural convection are in ‘competition’ for the stability of ordered dynamics: the former has a stabilizing effect while the latter exerts a destabilizing role.

Item Type:Article
ID Code:7767
Status:Published
Refereed:Yes
Uncontrolled Keywords:Instability, chemical waves, chaos, Belousov-Zhabotinsky reaction
Subjects:Area 03 - Scienze chimiche > CHIM/02 Chimica fisica
Divisions:002 Altri enti e centri di ricerca del Nord Sardegna > CNR-Consiglio Nazionale delle Ricerche
001 Università di Sassari > 01 Dipartimenti > Chimica
Publisher:Elsevier
eISSN:1873-4448
Deposited On:12 Jul 2012 11:58

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