In this research between 3-dimensional and axisymmetric modeling for movement of nano-particles in passing through a aerodynamic lens, and also between these models and famous model of Wang & Liu was compared. For this purpose, output of nano-particles penetration, divergence angel, and nano-particle velocity with Wang & Liu model was compared. Geometrical model used for aerodynamic lens compared to past research is more complete and has been selected based on practical model. With regard to low density of nano-particles, hypothesis of one way interaction between liquid and molecule has been selected. That is, movement of nano-particles does not have any effect upon flowing field. Trajectory of nano-particles with diameters of 1, 2, 6, 10, 30 and 50 were investigated. Cumulative fraction of radial that shows the amount of nano-particles divergence compared to axial system for diameters of 2, 6, 10, 20, and 30 were calculated in both three dimensional model and symmetrical model and compared with Wang & Liu model. Results are shownd that nano-particles with lower diameter because of more influence from outside power become farther and this matter create difference between results of two model, since in three dimensional model, nano-particles are affected in three ways by this power. These resultd show that axisymmetric modeling in nano-particles movement is not accurate and exact. Also, there is a good conformity between applied model and Wang & Liu model.