When the water flows through the tubes, under the tubes wall boundary layer effect, resulting in a series of small vortices. When the velocity reaches stable, these scroll detach from the side walls, into the turbulent core and decay until an energy vortex annihilation. In this process, the tube form a quasi-isotropic turbulence.After the water flows through the tubes, generating considerable scale vortex diameter base, subsequently, vortex cluster decay prevail homogeneous isotropic turbulence, and further strengthen the particle collision, which will help de-tangled mixed particles.Concentric pipes simultaneously acts as a filter, turning the inlet water big wave into small wave, and strengthen the micro vortex number and uniform distribution.