Y. Shiomi et al., 2-PHASE FLOW IN AN ANNULUS WITH A ROTATING INNER CYLINDER (FLOW PATTERN IN BUBBLY FLOW REGION), Nuclear Engineering and Design, 141(1-2), 1993, pp. 27-34
The two-phase flow pattern in a concentric annulus with a rotating inn
er cylinder have been investigated experimentally. The observed flow p
atterns were dispersed bubbly, ring-form, single-spiral, double-spiral
, triple-spiral flows and transition regions. When the rotational spee
d was at a relatively low level, the buoyancy effect of bubbles domina
ted the flow field and a dispersed bubbly flow was formed. On the othe
r hand, when the rotational speed was at a high level, the vortex moti
on induced by the rotation dominated the flow field and ring-form and
spiral flows were formed.