Effect of drag reducing polymers on oil–water flow in a horizontal pipe

Experimental study on the effect of drag reducing polymer on flow patterns and drag reduction in a horizontal oil–water flow

“…Above 400 Pa/m, the error in prediction is becoming appreciable reaching about 40% at the highest point. This can be attributed to that fact that Al-Sarkhi et al (2011) developed the correlation based on the experimental pressure gradient data of and Al-Yaari et al (2009) in which oil viscosities were lower than the one used in this study. The average error was found to be around 32%.…”

“…This study uses oil with higher viscosity (12 cp) compared to a similar study conducted by Al-Yaari et al (2009).…”

Friction factor correlations for gas–liquid/liquid–liquid flows with drag-reducing polymers in horizontal pipes

“…Furthermore, the recent detailed review by Al-sarkhi (2010) highlighted the importance of predicting the drag reduction in multiphase flow and the research still needed as almost all published works are experimental in nature. Al-yaari et al (2009) conducted an experimental investigation on the effect of DRPs on oil-water flow in a 2.54 cm ID horizontal pipe. The experimental results showed that the injection of water soluble polymer solution (DRP) in some cases produced drag reduction of about 65% with concentration of only 10-15 ppm.…”

“…shows published data ofAl-yaari et al (2009) andAl- wahaibi et al (2007) for oil-water flow in horizontal pipes with DRP. It can be clearly seen in the figure that all data follow the same trend.…”

Reviews on drag reducing polymers

“…• Have been widely applied as drag reducers in gasliquid and liquid-liquid flow systems [156][157][158][159][160][161][162][163]. • Subjected to mechanical degradation as their bonds rupture and their ability to reduce drag diminishes at high pumping shear rate especially for closed-loop systems.…”