The mixing in Taylor-Couette flow was studied with 2D laser-optical methods (Particle Image Velocimetry PIV and Laser Induced Fluorescence LIF). Mixing processes are grouped into three stages (macro-, meso- and micromixing) according to the characteristic length scale of the inhomogeneities under consideration. Results of this work are correlations which describe the macro-, mesoand micromixing times as a function of the geometry and process parameters with the mixing iso- and non-isoviscous fluids. The calculation of the micromixing times is shown as a function of the angular velocity of inner cylinder, the fluid viscosity and the geometry. With the fluid viscosity of 1·10
/s the mixing times are investigated as a function of the radial Reynolds number for three length scales. The macromixing times are calculated with help of two correlations for the axial dispersion coefficient in the turbulent and wave regime. The boundary between the regimes is applied to Re
= 20 Re
= 1. The macromixing times are the longest from the mixing times. Mesomixing times are shorter and the micromixing runs fastest here. The Mesomixing limits the velocity therefore the micromixing and the macromixinge with which occurs the mesomixing.