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It is found analytically that the parabolic radial profile of liquid velocity in cylindrical liquid-solidfluidized bed(LSFB)causes particles to circulate around some radial position.This is the main reason for liquid-phase axial dispersions.The liquid-phase axial dispersion is depressed as the liquid velocity presents a flatter Besselradial profile in a converging taper LSFB.The void fraction increases with axial distance in converging taper LSFB.The behavior produces less liquid-phase axial dispersion.Experimental results show good coincidence.
It is found that the parabolic radial profile of liquid velocity in cylindrical liquid-solid fluidized bed (LSFB) causes particles to circulate around some radial position. This is the main reason for liquid-phase axial dispersions. The liquid-phase axial dispersion is depressed as the liquid velocity presents a flatter Besselradial profile in a converging taper LSFB. The void fraction increases with axial distance in converging taper LSFB. The result produces less liquid-phase axial dispersion. Experimental results show good coincidence.