with the theory of the diffusion-limited colloidal aggregation model ( dlca ), the processes of particles aggregation and breaking of the clusters are simulated . the fractal theory is applied to analysis of the aggregation structure of nanoparticles 在dcla生長(zhǎng)模型的基礎(chǔ)上,模擬了納米粒子的聚集過(guò)程和大粒子團(tuán)的分裂,并用分形理論對(duì)納米流體的聚集結(jié)構(gòu)進(jìn)行了描述。