A theoretical investigation has been conducted for predicting the critical
liquid height at the onset of liquid entrainment during dual discharge from
a stratified two-phase region through branches mounted on an inclined flat
wall. The centerlines of the two branches are parallel and they fall in a
common vertical plane. Two models have been developed; a simplified point-s
ink model and a more-accurate finite-branch model. Predictions from the two
models are shown to be in good agreement for the condition of high flow ra
tes from the branches, while the finite-branch model is necessary for accur
ate predictions at low branch flow rates. This behaviour has been confirmed
experimentally for the vertical-wall configuration.