A modeling approach for the simulation of polydisperse two-phase flows is developed and validated. The novel model is based on the Euler-Euler ansatz for the modeling of the particle and fluid phase and the population balance equation - including coalescence and dispersion - with a presumed number density function for the particle size distribution. The model solves two additional transport equations for the moments (mean and variance) of the particle size distribution. With the local values of the moments and particle volume fraction, the particle size distribution is reconstructed and the particle size-dependent phase-interaction is calculated
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