Bursty events and incremental diffusion in a local diffusion and multi-scale convection system

• 来源期刊: 中国物理（英文版）
• 关键词: bursty events incremental diffusion self-organized criticality cellular automata
• 年，卷（期）: 2003,（2）
• 页码范围: 189-197
• 页数: 9页
• 语种: 英文

摘要

A one-dimensional cellular automaton is defined without the critical gradient rule (△h ＞△hc) which is essential to the existence of avalanches in self-organized criticality (SOC) models. Instead, only the local diffusion rule is used, however, the characteristics of SOC, such as the bursty behaviour, power-law decay in fluctuation spectra, selfsimilarity over a broad range of scales and long-time correlations, are still observed in these numerical experiments.This numerical model is established to suggest that the bursty events and the incremental diffusion observed universally in fusion experiments do not necessarily imply the submarginal dynamics.