Flow Configuration

Riser. In the riser, the gas and liquid flow upward, and the gas velocity is usually larger than that of the liquid. The only exception is homogeneous flow, in which case both phases flow at the same velocity. This can happen only with very small bubbles, in which case the free-rising velocity of the bubbles is negligible with respect to the liquid velocity. Although about a dozen different gas-liquid flow configurations have been developed (38), only two of them are of interest in ALRs (39,40):

1. Homogeneous bubbly flow regime, in which the bubbles are relatively small and uniform in diameter and turbulence is low

Operation variables

Gas input

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