INVESTIGATION OF THE WALL REGION OF GAS-LIQUID FLOW USING AN ELECTRODIFFUSIONAL TECHNIQUE

Measurements of the hydrodynamic characteristics of upward gas-liquid flow in an inclined channel were performed. Experiments were made by a n electrodiffusional method using microprobes for wall shear stress an d liquid velocity measurements. Special attention was paid to the stud y of two-phase flow structure in the vicinity of the wall. A strong ef fect of the channel orientation on the characteristics of the flow was demonstrated. The results show that maximum wall shear stress values correspond to an intermediate channel inclination. High values of near -wall void fraction result in the reduction of liquid velocity fluctua tions in horizontal and near-horizontal channel positions.