文章基本信息

标题：Critical size and curvature of wave formation in an excitable chemical medium
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作者：P. Foerster ; S. C. Müller ; B. Hess 等
期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：1989
卷号：86
期号：18
页码：6831-6834
DOI：10.1073/pnas.86.18.6831
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：The critical radius for the outward propagation of waves in an excitable solution of the Belousov--Zhabotinskii reaction was experimentally analyzed and found to be {approx}20 {micro}m, being in a range predicted by theory. Thus, the wave initiation depends on the critical radius in an all-or-none fashion. For waves having high positive curvature of wave fronts, a linear relationship between the curvature and their normal velocity was established, allowing computation of a diffusion coefficient of 1.9 x 10-5 cm2/s for the autocatalytic species, which agrees well with results previously obtained for negatively curved wave fronts. The analysis of the dispersion of wave velocity yielded the decrease of wave velocity for small initiation periods as predicted theoretically.
关键词：Belousov—Zhabotinskii reaction ; nucleation size ; dispersion ; wave propagation