By using the impulse response method, the axial dispersion coefficient of the continuous phase and the dispersed phase were measured respectively, and the experimental ranges of those parameters are following, dispe.

Investigation on the relationship of axial dispersion coefficient(E\-c) and the operating conditions,such as the rotor speed(N\-R) and the flow rate(U\-d & U\-c),was carried out with the method of pulse input of tracer in CTRDC(rotating disk contactor with closed turbine).

33 r/s,the results showed that the axial diffusion coefficient increased with the increase of liquid velocity and gas velocity,and first increased then decreased with the increase of the stirring speed while the gas hold-up increased with the increse of stirring speed,liquid velocity and gas velocity increased.

As a result,a generalized correlations of the gas dispersion coefficient is obtained.

Peclet number(Pe) and mixing time(tm) represent axial dispersion behavior and mixing behavior,respectively.

Peclet number(Pe) is used to represent the axial dispersion.

The axial dispersion in chromatography models was discussed with vector method and the effect of diffusion on the bulk flow flux with its partial quantity form was pointed too.

Determination of longitudinal dispersion coefficient of rivers through laboratory experiment;