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CHARACTERIZATION OF TURBULENT DRAG REDUCTION IN ROTATING DISK SYSTEM
Korean Journal of Chemical Engineering, January 1994, 11(1), 8-13(6), 10.1007/BF02697509
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Abstract
Turbulent drag reduction in a rotating disk apparatus was characterized for a homologous series of polyethylene oxide(PEO) polymers covering a wide range of molecular weights. The concentration dependence of drag reduction in this system was shown to obey an empirical dray reduction equation which had been previously established by Virk et al. for flows in capillary tubes. The linear correlation between polymer concentration and C/DR for different molecular weights of PEO was also obtained. In addition, [C], defined as a characteristic intrinsic concentration, was found to be extremely useful in normalizing the drag reduction data in one homologous series of PEO.
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Little RC, Ind. Eng. Chem. Fundam., 8, 557 (1969)
Virk PS, Merrill EW, Mickley HS, Smith KA, J. Fluid Mech., 30, 305 (1967)
Bailey FE, Kucera JL, Imhoff LG, J. Polym. Sci., 32, 517 (1958)
Little RC, Hansen RJ, Hunston DL, Kim OK, Patterson RL, Ting RY, Ind. Eng. Chem. Fundam., 14(4), 283 (1975)
Little RC, J. Colloid Interface Sci., 37, 811 (1971)
Ting RY, Little RC, J. Appl. Polym. Sci., 17, 3345 (1973)
Dschagarowa E, Mennig G, Rheol. Acta, 16, 309 (1977)
