Article ID Journal Published Year Pages File Type
654030 International Communications in Heat and Mass Transfer 2009 6 Pages PDF
Abstract

In this study, polyethylene oxides were used as a drag reducing additive. The effect of the concentration and molecular weight of the polymer on the level of drag reduction was examined using, 4 molecular weights (2 × 105, 4 × 105, 9 × 105 and, 4 × 106) and 4 concentrations (1, 5, 10 and, 20 wppm) of PEO. The hydraulic conditions were varied from a Reynolds number of 30,000 to 60,000. The results showed a > 20% drag reduction rate for all molecular weights and constructions of PEO within the range investigated in this study. Moreover, the maximum drag reduction rate was 50% at a molecular weight and concentration of 4 × 106 and 20 wppm, respectively. Overall, the results show that the drag reduction effect tends to increase with increasing molecular weight and Reynolds number.

Related Topics
Physical Sciences and Engineering Chemical Engineering Fluid Flow and Transfer Processes
Authors
, , , , ,