Kinematic of focusing regions

We describe the interaction between focusing regions and analyze the resulting physical features. The study is supported by the fact that focusing regions exhibit particle-like behavior and the interaction among these presents features similar to inelastic collision. When focusing regions are generated in a medium with random refractive index, the irradiance distribution along the focusing regions changes according to the diffusion process and the collision between them generates vortex-like effects. This study was implemented by solving the irradiance transport equation. Experimental results are in good agreement with the theoretical model performed.