A vortex particle method for modelling of 3D inviscid and viscous flows has been presented. Calculations were done for two different redistribution methods of vorticity carries by particles on grid nodes: method of weighted volume and method of "volume of a grid node". A viscous splitting algorithm was used: initially the Euler inviscid equations were solved, next the viscous effect was taken into account by the solution of the diffusion equation. Validation of the method was tested by simulation of the "vortex game" phenomenon for inviscid flow and for viscous flow, it was reproduced the reconnection phenomenon of two colliding vortex rings.