摘要
A new model for determining bubble size distributions in bubble columns by the dynamic gasdisengagement(DGD)technique is developed.It is based on an idea of non-uniform steady statedirstribution of bubble dispersion.Interpreting the axial non-uniformity,this model gives axial gasholdup distributions.If assuming an axially homogeneous dispersion,a radial gas holdup distributioncan be obtained.The Sauter mean diameters or specific interfacial areas for several systems areestimated by the technique.The results for an air-water system agree with those measured by afive-point conductivity probe technique.The obtained axial gas holdup distributions agree well withreported measurements and the radial gas holdup distributions are also reasonable.
A new model for determining bubble size distributions in bubble columns by the dynamic gas disengagement (DGD) technique is developed. It is based on an idea of non-uniform steady state dirstribution of bubble dispersion. Interpreting the axial non-uniformity, this model gives axial gas holdup distributions. If assuming an axially homogeneous dispersion, a radial gas holdup distribution can be obtained. The Sauter mean diameters or specific interfacial areas for several systems are estimated by the technique. The results for an air-water system agree with those measured by a five-point conductivity probe technique. The obtained axial gas holdup distributions agree well with reported measurements and the radial gas holdup distributions are also reasonable.
