Weakening or losing of surfactant drag reduction ability: A coarse-grained molecular dynamics study

Liu, Fei1,2; Liu, Dongjie1; Zhou, Wenjing1; Wang, Steven3; Chen, Fei1; Wei, Jinjia1

2020

10.1016/j.ces.2020.115610

CHEMICAL ENGINEERING SCIENCE   影响因子和分区

0009-2509

1873-4405

Surfactant drag reduction has wide applications in energy power and chemical industries. However, the drag reduction ability will be weakened or lost during long-term applications. We studied the surfactant drag reduction in turbulent pipe flow using coarse-grained molecular dynamics simulations and cryogenic transmission electron microscopy experiments. The results show that the weakening/loss of surfactant drag reduction ability occurs under the following conditions: weak alkalinity of the solution, tiny rust particles in the solution, and/or the rusty wall of the pipeline. Weak alkalinity conduces to irregular structures of surfactant micelles, charged tiny iron rust particles can adsorb the surfactant micelles and fill into micelle network gaps, and the rusty wall could adsorb part of the surfactant micelles and lessen the global micelle network structure. All the three can destroy the micelle network structure and result in partial or complete failure of the turbulent drag reduction.
© 2020 Elsevier Ltd

Surfactant drag reduction ability Weakening or losing Surfactant micelles Martini force field Coarse-grained molecular dynamics simulation

EI ; SCI

英语

其他

National Natural Science Foundation of China[21803040] ; Fundamental Research Funds for the Central Universities[]

Engineering

Engineering, Chemical

WOS:000530711700021

Elsevier Ltd

20201108279985

Alkalinity ; Chemical industry ; Drag reduction ; High resolution transmission electron microscopy ; Molecular dynamics ; pH ; Surface active agents ; Turbulent flow

Fluid Flow, General:631.1 ; Optical Devices and Systems:741.3 ; Chemistry:801 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Engineering, General:805

CHEMISTRY

EV Compendex

1.School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an; 710049, China
2.Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, Shenzhen; 518055, China
3.Department of Mechanical Engineering, City University of Hong Kong, 999077, Hong Kong

Liu, Fei,Liu, Dongjie,Zhou, Wenjing,et al. Weakening or losing of surfactant drag reduction ability: A coarse-grained molecular dynamics study[J]. CHEMICAL ENGINEERING SCIENCE,2020,219.

Liu, Fei,Liu, Dongjie,Zhou, Wenjing,Wang, Steven,Chen, Fei,&Wei, Jinjia.(2020).Weakening or losing of surfactant drag reduction ability: A coarse-grained molecular dynamics study.CHEMICAL ENGINEERING SCIENCE,219.

Liu, Fei,et al."Weakening or losing of surfactant drag reduction ability: A coarse-grained molecular dynamics study".CHEMICAL ENGINEERING SCIENCE 219(2020).