Numerische Abbildung von reaktiven Strömungen und Partikel

This habilitation thesis deals with the modeling of reactive flows and particles. The developed approaches are applied to the modeling of nitrogen oxide emissions, the numerical description of the deflagrations of organic dusts and the thermal modelling of granularmaterials. A two-stage concept with a postprocessing method was created to model nitrogen oxide emissions, wich is characerized by its numerical efficiency. To describe the deflagration of organic dusts, a burning velocity-based model was developed wich consicers the relative movement of the dust. By analyzing the effects inside the particles, a particle-based model could be created for the deflagration of Lycopodium dust. To evaluate the model of dust deflagrations, an experimental setup was developed which has a low wall influence. The description of the thermal behavior of granular materials is based on Computational Fluid Dynamics (CFD) - Disrete Element Method (DEM) coupling. Techniques to split the time scale between the CFD and DEM side and to make cell sizes independent of the particle sizes are implemented.