Long-chained polymeric drag-reducing agents suffer from mechanical degradation when exposed to a high-shearing environment during the transportation of liquids in turbulent flow mode. Improving the polymer's resistance to shear forces using chemical methods is time-consuming and associated with high costs. The drag reduction performance and stability of xanthan gum polymer, cetyltrimethylammonium bromide surfactant, and their physically formed complexes were investigated using a high-shear rotating-disk apparatus. The results demonstrated that all the examined additives could act as effective drag-reducing agents, and their complexes showed modified mechanical degradation and drag reduction performances.
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