Flow pattems in the liquid cyclone consist of the circulation and translation of a film, or of a formed vortex. The Navier Stokes equations for the flow of a viscous in- compressible fluid in a liquid cyclone are considered. The equations are reduced to two ordinary differential equatîons in terms of stream and circulation functions. These equ- ations contain two dimensionless numhers: the Reynolds and Rossby numbers and it is assumed that they may be applied to flow in a liquid cyclone with Re interpreted as a constant turbulent Reynolds number. The differential equations have no analytical solution but may be integrated numerically. This has been done under conditions which correspond to the experiments of Kelsall and satisfactory agreement with the experi- mental results was obtained