FLOW REGIMES OF VISCOUS IMMISCIBLE LIQUIDS IN T-TYPE MICROCHANNEL

Abstract

A computational and experimental study of the flow regimes of a mixture of cas- tor and paraffin oils in a T-type microchannel with 200 ·400 mm cross section was carried out. The ranges of parallel, slug, droplet, and rivulet flow regimes of the tested mixture were defined. According to the experimental results, a flow regime map was constructed for this mixture depending on the Weber number multiplied by the Ohnesorge number. A correlation of the length of paraffin oil slugs to the fluid flow ratio was established. The experimental data were compared with re- sults of numerical simulation. A good agreement between calculation and experi- mental data was achieved in terms of reproduction of flow regimes, phase bound- aries, and slug length.