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Figure 7.14
Schematic representation of a Wurster processor
Karlsson et al. (2009) used multiphase CFD to simulate particle and
gas motion, with detailed information about temperature and moisture
content. The simulation showed characteristic circulation of particles in
the processing chamber, which is in agreement with experimental
observations. It was found that the moisture content in the particle phase
decreases when the particles pass through the draft tube, showing that
most of the drying takes place in the Wurster tube (Figure 7.15). Mass
transfer was also found to decrease with increase in height in the Wurster
 
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