Effect of salt on turbulent drag reduction of xanthan gum. (5th May 2015)

• Record Type: Journal Article
• Authors: Hong, Cheng Hai; Choi, Hyoung Jin; Zhang, Ke; Renou, Frederic; Grisel, Michel
• Is Part Of: Carbohydrate polymers. Volume 121(2015)
• Page Start: 342
• Page End: 347
• Publication Date: 2015-05-05
• Subjects: Xanthan gum -- Turbulent drag reduction -- Mechanical degradation; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2014.12.015
• Languages: English
• ISSNs: 0144-8617

Abstract

Highlights: Xanthan gum (XG) is applied as a turbulent drag reducer. Turbulent drag reduction is studied using a rotating disk apparatus. Mechanical degradation of XG under a turbulent flow is examined using model equation. KCl salt is found to affect turbulent drag reduction efficiency of XG. 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.