caa a22 4500 475763831 CHVBK 20180406123559.0 cr unu---uuuuu 170329e20000701xx s 000 0 eng 10.1007/s003960000328 doi (NATIONALLICENCE)springer-10.1007/s003960000328 Universal drag reduction characteristics of saline water-soluble poly(ethylene oxide) in a rotating disk apparatus [Elektronische Daten] [H. J. Choi, C. A. Kim, J. H. Sung, C. B. Kim, W. Chun, M. S. Jhon]  Polymer-induced turbulent drag reduction in a rotating disk apparatus was investigated using nonionic poly(ethylene oxide) (PEO) in a synthetic saline solution with novel application to ocean thermal energy conversion technology. A maximum total (skin friction plus form) drag reduction of 30% was obtained with 50 wppm of PEO with molecular weight 5.0 × 106. The concentration dependence of the percentage drag reduction for the PEO/saline solution system is found to fit Virk's empirical correlation, and a universal correlation for various molecular weights and Reynolds numbers is also presented. Furthermore, hydrodynamic volume fraction was introduced to correlate drag reduction efficiency with molecular parameters in this PEO/saline solution system. Springer-Verlag Berlin Heidelberg, 2000 Key words Drag reduction nationallicence Poly(ethylene oxide) nationallicence Hydrodynamic volume nationallicence Ocean thermal energy conversion nationallicence Rotating disk flow nationallicence Turbulence nationallicence Choi H. J. Department of Polymer Science and Engineering, Inha University Inchon 402-751, Korea e-mail: hjchoi@inha.ac.kr, KR aut Kim C. A. Department of Polymer Science and Engineering, Inha University Inchon 402-751, Korea e-mail: hjchoi@inha.ac.kr, KR aut Sung J. H. Department of Polymer Science and Engineering, Inha University Inchon 402-751, Korea e-mail: hjchoi@inha.ac.kr, KR aut Kim C. B. Department of Mechanical Engineering Inha University, Inchon 402-751, Korea, KR aut Chun W. Department of Nuclear and Energy Engineering, Cheju National University Cheju 690-756, Korea, KR aut Jhon M. S. Department of Chemistry Engineering Carnegie Mellon University Pittsburgh PA 15213, USA, US aut https://doi.org/10.1007/s003960000328 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s003960000328 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Choi H. J. Department of Polymer Science and Engineering, Inha University Inchon 402-751, Korea e-mail: hjchoi@inha.ac.kr, KR aut NATIONALLICENCE 700 1- Kim C. A. Department of Polymer Science and Engineering, Inha University Inchon 402-751, Korea e-mail: hjchoi@inha.ac.kr, KR aut NATIONALLICENCE 700 1- Sung J. H. Department of Polymer Science and Engineering, Inha University Inchon 402-751, Korea e-mail: hjchoi@inha.ac.kr, KR aut NATIONALLICENCE 700 1- Kim C. B. Department of Mechanical Engineering Inha University, Inchon 402-751, Korea, KR aut NATIONALLICENCE 700 1- Chun W. Department of Nuclear and Energy Engineering, Cheju National University Cheju 690-756, Korea, KR aut NATIONALLICENCE 700 1- Jhon M. S. Department of Chemistry Engineering Carnegie Mellon University Pittsburgh PA 15213, USA, US aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer