The proposed project is based on utilizing the findings from our previous project to provide improved knowledge about the distribution of the local turbulent energy dissipation rate e in dispersion systems. We will investigate theoretically and experimentally proved results for the dependence of e on Reynolds number, and will also extend the experiments to a larger vessel size up to 0.45 m with the LDA and PIV technique and to improved e evaluation procedures. This will provide accurate e contours in systems of different geometries. The information that is obtained will enable predictions of the evolution of the particle size distribution (PSD) for immiscible l-l and l-s systems. A better simulation will also be made of the PSD evolution when the process and design parameters are scaled up and optimized. Our study will also contribute to dispersion theory, CFD validation and improved dispersion equipment design. The expected results will also contribute to the theoretical backgrounds of nanotechnologies, primarily for nanoreactors and bioreactors in which complex reactions run.