title: Effect of salt on turbulent drag reduction of xanthan gum.
abstract: The turbulent flow of an aqueous KCl solution driven by a rotating disc in a closed chamber showed significant drag reduction (DR) when a small amount of xanthan gum (XG) was added. The effects of the experimental parameters (XG and KCl concentrations, and time) on the drag reduction efficiency were examined. While the DR efficiency of XG decreased with increasing salt (KCl) concentration, the time-dependent DR efficiency was found to be fitted well using Brostow model equation.
authors: Department of Polymer Science and Engineering, Inha University, Incheon 402-751, Republic of Korea.
authors: Cheng Hai
authors: CH
authors: Hong
authors: Department of Polymer Science and Engineering, Inha University, Incheon 402-751, Republic of Korea. Electronic address: hjchoi@inha.ac.kr.
authors: Hyoung Jin
authors: HJ
authors: Choi
authors: School of Chemical Engineering and Technology, Harbin Institute of Technology, 150001 Harbin, People's Republic of China.
authors: Ke
authors: K
authors: Zhang
authors: University of Le Havre, URCOM, EA 3221, FR CNRS 3038, 25 rue Philippe Lebon, B.P. 540, 76058 Le Havre Cedex, France.
authors: Frederic
authors: F
authors: Renou
authors: University of Le Havre, URCOM, EA 3221, FR CNRS 3038, 25 rue Philippe Lebon, B.P. 540, 76058 Le Havre Cedex, France.
authors: Michel
authors: M
authors: Grisel
keywords: Mechanical degradation; Turbulent drag reduction; Xanthan gum