Flow pattern visualisation of immiscible liquid-liquid flow in a T-shaped microchannel
Flow regime visualization for immiscible liquid-liquid flow in a T-shaped microchannel with rectangular cross-section was done. For three sets of immiscible liquids, kerosene – water, paraffin oil – water and castor oil – paraffin oil flow patterns in a broad wide range of Weber numbers were obtained. Following typical flow patterns were observed: parallel flow, slug flow, plug flow, dispersed (droplet) flow and rivulet flow. It was shown that flow pattern maps based on Weber numbers for different liquid sets does not match well. Weber number multiplied by liquid viscosity proposed as a new parameter for universal flow map.