Abstract
The effects of experimental parameters such as temperature, polymer concentration, and rotational speed of the disk on drag reduction properties of water-soluble copolymer of poly(acrylamide-co-acrylic acid) in a turbulent flow were examined. Drag reduction (DR) efficacy up to 45% was found to be dependent on its medium temperature in a rotating disk apparatus. When the temperature was increased, the copolymer was found to be much susceptible to mechanical degradation, indicating that polymer chain scission becomes more severe at elevated temperatures. In addition, the optimum copolymer concentration for high DR efficacy was also observed.
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This work was supported by research fund (39704-1) both from National Research Foundation of Korea (2010) and that (2007-E-ID25-P-04-0-000) from Ministry of Knowledge Economy (2008), Korea.
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Zhang, K., Choi, H.J. & Jang, C.H. Turbulent drag reduction characteristics of poly(acrylamide-co-acrylic acid) in a rotating disk apparatus. Colloid Polym Sci 289, 1821–1827 (2011). https://doi.org/10.1007/s00396-011-2502-0
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DOI: https://doi.org/10.1007/s00396-011-2502-0