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Effect of Solubility Parameter of Polymer-Solvent Pair on Turbulent Drag Reduction |
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| Authors: | Chul Am Kim Hyoung Jin Choi Jun Hee Sung Hyung Min Lee Myung S. Jhon |
| Affiliation: | 1. Electronics and Telecommunications Research Institute, Daejon 305-350, Korea Department of Polymer Science and Engineering, Inha University, Incheon 402-751, Korea, Fax: (+82) 32 865 5178;2. Department of Polymer Science and Engineering, Inha University, Incheon 402-751, Korea, Fax: (+82) 32 865 5178;3. Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA |
| Abstract: | Polymer-induced turbulent drag reduction by adding a minute amount of high-molecular weight polyisobutylene (PIB) into two different organic solvents of n-heptane and xylene was examined using a rotating disk system. The dependence of drag reduction (DR) efficiency on various factors such as polymer molecular weight, polymer concentration (C), and solvent quality was examined. Based on the linear relationship between C and C/DR for different molecular weights of PIB, a universal curve was able to characterize a particular polymer/solvent family, independent of the molecular weight of polymer. |
| Keywords: | drag reduction molecular weight polyisobutylene solubility parameter turbulent flow |