Two-phase gas-liquid flow in horizontal corrugated channels

Experiments have been carried out for adiabatic concurrent gas-liquid flow of nitrogen and water through two corrugated test sections. This study exam ines flow patterns as the gas fluxes are increased. At low gas fluxes two m ain patterns have been observed: stratified flow for low liquid fluxes and bubble flow for greater ones. The mean wall shear stress of the two-phase f low has been measured with the electrochemical method (polarography); its a nalysis reveals the flow structure modification from monophasic to two-phas e flow. (C) 2000 Elsevier Science Ltd. All rights reserved.