Hydrodynamics of gas–liquid Taylor flow and liquid–solid mass transfer in mini channels: Theory and experiment

Hydrodynamics of Taylor (slug) flow in horizontal capillary with an inner diameter of 0.92 mm in water–air and glycerol solution–air systems was studied. Experimental data of bubble velocity, dynamic gas hold-up and void fraction were compared with values that were calculated by proposed earlier mathematical model of slug flow in capillary. This model is in a good agreement with experimental data in the range of capillary numbers between 0.05 and 0.12. Also liquid–solid mass transfer coefficient for slug flow and homogeneous flow was experimentally obtained in horizontal capillary with an inner diameter of 2.26 mm and 2.76 mm in a caustic soda solution–air system.

► Investigation of Taylor flow hydrodynamics in horizontal capillary.
► Proposed mathematical model is in good coincidence with experiments.
► Bubble velocity, dynamic gas hold-up and void fraction could be predicted.
► Liquid–solid mass transfer intensification due to Taylor circulations is found.