Liquid-wall shear stress in stratified liquid/gas flow

Stratified liquid/gas flow was experimentally investigated in a horizontal or slightly inclined circular pipe. The polarographic method was used to determine the liquid-wall shear stress. Both the liquid fraction and pressure gradient were also measured. Sixteen wall electrodes were positioned around the tube perimeter. Local liquid-wall shear stress profiles are presented for horizontal and near-horizontal flows. The averaged values are compared with the results obtained from a stratified flow model and models using the experimental data of liquid fraction and pressure drop.

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