This work deals with enhancements of different numerical models used by the Euler/Lagrange approach, a common technique for the simulation of disperse multiphase flows. A model for an independent control of the time steps used by fluid and particles has been introduced. This approach allows an exact temporal resolution for fast moving particles, whereas slow particles or the surrounding fluid may be resolved with larger time steps. In addition, a technique for modelling turbulent particle dispersion based Large Eddy Simulations has been developed and an approach for the representation of dynamic agglomerate structures has been implemented. The improved models have been tested in the prediction of coherent dust strains found in some types of swirling flows and validated by experimental data.