Two-Phase Flow of Gas-Non-Newtonian Liquid in Horizontal Pipes

Lockhart-Martinelli type of analysis has been extended to gas and non-Newtonian liquid two-phase flow in horizontal pipes, and a modified Lockhart-Martinelli parameter X has deduced for all the flow regimes, namely, laminar-laminar, laminar-turbulent, turbulent-laminar and turbulent-turbulent regimes. Experiments were conducted on pressure drop, liquid holdup and flow patterns in the pipes of 20. 02 and 22. 22mm internal diameter, using air as the gaseous phase, and 3. 5% to 4. 5% (wt/wt) polyacrylamide in water as test liquids. Pressure drop and liquid holdup results were found to agree satisfactorily with the modified Lockhart-Martinelli correlations.