The degree to which gas flowing in the riser is entrapped and recirculated through the downcomer is an important variable, since it influences not only the flow configuration in the downcomer, but also the overall performance of the
1000 2000 3000 True riser gas flow rate Qr (cm3/s)
Figure 16. Gas recirculation in a split-cylinder ALR. The level indicated corresponds to no-aeration conditions. Adapted from Siegel et al. (35).
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