Measurements of kinematical parameters of spiral waves in media of low excitability

On Uma Kheowan, Vilmos Gáspár, Vladimir S. Zykov, Stefan C. Müller

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

The dynamics of spiral waves rotating in a thin layer of the light sensitive Belousov-Zhabotinsky reaction mixture are studied under a homogeneous and steady illumination. At a given composition of the excitable medium, the spiral waves meand, when no or low intensity light is applied, or rigidly rotate, when the light intensity is increased sufficiently. There exists, however, a critical value of light intensity above which no wave activity is supported by the medium, since its excitability is too strongly reduced by the illumination. In the vicinity of this critical value the basic kinematical parameters of rigidly rotating spirals (such as the rotation period, wavelength, propagation velocity, and the diameter of the spiral core) are measured as a function of the illumination intensity. The experimental observations are in good agreement with the predictions based on an earlier proposed kinematical theory of spiral waves in media of low excitability.

Original languageEnglish
Pages (from-to)4747-4752
Number of pages6
JournalPhysical Chemistry Chemical Physics
Volume3
Issue number21
DOIs
Publication statusPublished - Jan 1 2001

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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