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生長模型的基礎(chǔ)上,模擬了納米粒子的聚集過程和大粒子團的分裂,并用分形理論對納米流體的聚集結(jié)構(gòu)進行了描述。