Abstract
Flow regime study was conducted in a 0.3 m diameter, 15.5 m height circulating fluidized bed (CFB) riser with an abrupt exit at the National Energy Technology Laboratory of the U. S. Department of Energy. Solids fraction and particle velocity data for both the high and low density suspension in the riser were analyzed to investigate how the gas-solids flow could reach a fully developed condition in the riser. A fully developed condition in the riser is defined by (2001a) as: The radial solids distribution in the riser no longer changes with its axial location. Results of the data analysis are discussed in the following sections.
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