Modelling the split of horizontal annular flow at a T-junction

A model is presented for the split of annular gas/liquid flow at a horizont al T-junction. It employs a sub-model which assumes a specific fraction of liquid to be entrained as drops, and utilizes film thickness/shear stress r elationships and particular forms of velocity profiles within the film to d etermine the circumferential variation of film flow rate. The model can suc cessfully predict the phase split for large diameter (0.127 m) junctions as well as those with smaller diameters. It is suggested that poorer predicti ons might be caused by incorrect values of entrained fraction being used. T he results of the horizontal annular flow sub-model are used to examine the assumptions of the split model.