Stratified gas-liquid two-phase electrohydrodynamics in horizontal pipe flow

Stratified gas-liquid two-phase electrohydrodynamics in pipe flow has been studied experimentally and numerically. Experimental studies were conducted using 1.27 and 1.9*10/sup -2/ m-inner diameter horizontal tubes with air-water two-phase flow for the range of gas surface velocity of 10+or-/sup 2/-10 m/s, liquid surface velocity of 10/sup -2/-2*10/sup -1/ m/s, and applied voltage of 0-20 kV. Experimental results are analysed by an area-averaged two-fluid one-dimensional model. The results show that the effect of the applied electric field is significantly influenced by the flow regime transition boundaries between stratified smooth-to-wavy and stratified wavy-to-intermittent flow. However, the time-averaged void fraction was not observed to be significantly influenced by applied electric fields.>