Diffusion in disordered fractals
Diffusion in disordered fractals
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无序分形中的扩散
DOI:
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发表时间:
2005
期刊:
影响因子:
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通讯作者:
S. Tarafdar
中科院分区:
文献类型:
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作者:
D. N. Anh;K. Hoffmann;S. Seeger;S. Tarafdar
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.