Abstract
The knowledge of pulsation active method is essential for reliable regulation of particle clusters in pulsating fluidized bed risers. This study presents a comparison of the computed occurrence of particle clusters using a computational criterion in an inlet gas pulsation-assisted riser. The occurrence of clusters is identified according to the minimum rate of energy dissipations using dynamic cluster structure-dependent drag model. The influences of inlet gas velocity, frequency and amplitude on cluster characteristics are analyzed along lateral and axial directions. The cluster diameters and existence time fractions as well as the gas volume fractions of the dense phase vary with changing inlet gas velocity frequencies and amplitudes when compared to a constant inlet gas velocity. The particle cluster number is reduced from a large fraction at a constant inlet gas velocity to a low fraction in an inlet gas pulsation-assisted fluidized bed risers.
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