Evaluating the agglomeration risk in a Wurster fluidized bed coater using coarse-grained CFD-DEM *S. Irndorfer (Research Center Pharmaceutical Engineering, G), P. Liu (Worldwide Research and Development, Pfizer In), D. Eisenberg (Worldwide Research and Development, Pfizer In), L. Contreras (Worldwide Research and Development, Pfizer In), D. Jajcevic (Research Center Pharmaceutical Engineering, G), J. Khinast (Research Center Pharmaceutical Engineering, G)