Diffusion in disordered fractals

Diffusion in disordered fractals
复制标题

无序分形中的扩散

DOI:
--
复制
发表时间:
2005
期刊:
影响因子:
--
通讯作者:
S. Tarafdar
S. Tarafdar
中科院分区:
--
文献类型:
--
作者:
D. N. Anh;K. Hoffmann;S. Seeger;S. Tarafdar

文献摘要

被引文献

相似文献

无序介质中的扩散可以用分形中的反常扩散来模拟。到目前为止,通常使用规则分形作为这种无序系统的模型。在这里,我们研究无序分形,试图捕捉无序材料的随机性。特别是,我们调查随机混合不同的谢尔宾斯基地毯生成器得到的分形中的扩散。我们发现,随机游走指数dw表现出很强的依赖性的混合组成。对于混合系统,它可以高于或低于两种纯组分。此外,dw可以在混合时减小,表明在无序系统中更快的扩散。
Diffusion in disordered media can be modelled by the anomalous diffusion in fractals. Up to now, usually regular fractals were used as models for such disordered systems. Here we study disordered fractals in an attempt to capture the random nature of the disordered material. In particular, we investigate the diffusion in fractals obtained by randomly mixing different Sierpinski carpet generators. We find that the random-walk exponent dw shows strong dependance on the mixture composition. For the mixed system it can be higher or lower than both the pure components. Further, dw may decrease on mixing, indicating faster diffusion in the disordered system.