TY - JOUR TI - A simple moment model to study the effect of diffusion on the coagulation of nanoparticles due to Brownian motion in the free molecule regime AU - Wang Wenxi AU - He Qing AU - Chen Nian AU - Xie Mingliang JN - Thermal Science PY - 2012 VL - 16 IS - 5 SP - 1331 EP - 1338 PT - Article AB - In the study a simple model of coagulation for nanoparticles is developed to study the effect of diffusion on the particle coagulation in the one-dimensional domain using the Taylor-series expansion method of moments. The distributions of number concentration, mass concentration, and particle average volume induced by coagulation and diffusion are obtained.