Pressure drop and holdup studies of air-liquid flow in helical coils

Experimental studies on the pressure drop and holdup for cocurrent upwards (turbulent-turbulent) flow of air-liquid systems through copper coils are presented. A new correlation for the two-phase frictional pressure drop is proposed based on the modified Lockhart-Martinelli parameter φG2-1 in terms of dimensionless groups. © 1984.