分形结构中粒子扩散过程随机模拟.docx
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分形结构中粒子扩散过程随机模拟
摘要: 为分析孔隙分形维数和分形结构形式对粒子 扩散特性的影响,通过生成分形结构模拟粒子在分形结构中 的随机行走, 探索分形介质中粒子扩散的运动规律 .数值模拟 结果显示,粒子在分形结构中的扩散行为受到起点位置、主 通道和次通道形状及分形维数等因素的影响 .
关键词: 分形; 粒子; 随机行走; 反常扩散; 多 孔介质; 通道
中图分类号: X53 文献标志码: B
Abstract : To analyze the effect of pore fractal dimension and fractal structures on the particle diffusion characteristics , a fractal structure is built and the particle random walk in it is simulated , and the movement mechanism of particle diffusion in fractal media is explored. The numerical simulation results show that the particle diffusion behavior in fractal structure is affected by the factors , such as the start position, the shapes of main channel and subchannel, the fractal dimension , etc.
Key words : fractal ; particle ; random walk; anomalous diffusion ; porous media; channel