LOW-DIMENSIONAL SPATIOTEMPORAL THERMAL DYNAMICS ON NONUNIFORM CATALYTIC SURFACES

被引：46

作者：

CHEN, CC ^{[1
]}

WOLF, EE ^{[1
]}

CHANG, HC ^{[1
]}

机构：

[1] UNIV NOTRE DAME,DEPT CHEM ENGN,NOTRE DAME,IN 46556

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1993年 / 97卷 / 05期

关键词：

D O I：

10.1021/j100107a013

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Nonuniform catalytic activity on a supported catalyst for exothermic oxidation reaction is shown to induce low-dimensional, coherent-structure-dominated pattern dynamics. By analyzing the IR thermographic video images of thermal patterns during CO oxidation at a R h black/SiO2 wafer and by projecting the spatiotemporal dynamics of the thermal pattern onto a low-dimensional (n < 3) reconstructed phase space using a Karhunen-Loeve procedure, we are able to relate the observed pattern dynamics to attractors of dynamical systems theory. One specific hot spot migration dynamics is interpreted as a Melnikov transition to intermittent chaos involving a homoclinic orbit. Periodic-forcing experiments also show the same entrainment features of low-dimensional systems.

引用

页码：1055 / 1064

页数：10

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