SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2020, Vol. 28 ›› Issue (1): 63-75.DOI: 10.1016/j.cjche.2019.04.015

• Fluid Dynamics and Transport Phenomena • Previous Articles     Next Articles

The investigation and optimization of drag reduction in turbulent flow of Newtonian fluid passing through horizontal pipelines using functionalized magnetic nanophotocatalysts and lecithin

Nadia Esfandiari, Reza Zareinezhad, Zahra Habibi   

  1. Department of Chemical Engineering, Marvdasht Branch, Islamic Azad University, Marvdasht, Iran
  • Received:2019-01-03 Revised:2019-03-22 Online:2020-03-31 Published:2020-01-28
  • Contact: Nadia Esfandiari

The investigation and optimization of drag reduction in turbulent flow of Newtonian fluid passing through horizontal pipelines using functionalized magnetic nanophotocatalysts and lecithin

Nadia Esfandiari, Reza Zareinezhad, Zahra Habibi   

  1. Department of Chemical Engineering, Marvdasht Branch, Islamic Azad University, Marvdasht, Iran
  • 通讯作者: Nadia Esfandiari

Abstract: The nanophotocatalysts were synthesized in four stages and evaluated by FTIR, FESEM and VSM analysis. The influence of nanofluids containing functionalized magnetic TiO2 nanophotocatalyst and dipalmitoylphosphatidylcholine lecithin in drag reduction of turbulent flow in four horizontal pipelines was studied. The effective parameters on drag reduction (nanoparticle concentration, surfactant concentration, pH and Re number) were investigated and optimized in each pipeline using response surface method. The drag reduction in 1/2" galvanized, 3/4" galvanized, 1/2" five-layer and 1/2" cuprous pipelines was found 99.1%, 92.5%, 87.6% and 85.2%, respectively. The model adequacy was measured using ANOVA. Based on the high determination coefficient, more than 95% of variance of experimental data in all pipelines was described by quadratic model.

Key words: Drag reduction, Lecithin, Functionalized magnetic nanophotocatalyst, Turbulent flow, Response surface

摘要: The nanophotocatalysts were synthesized in four stages and evaluated by FTIR, FESEM and VSM analysis. The influence of nanofluids containing functionalized magnetic TiO2 nanophotocatalyst and dipalmitoylphosphatidylcholine lecithin in drag reduction of turbulent flow in four horizontal pipelines was studied. The effective parameters on drag reduction (nanoparticle concentration, surfactant concentration, pH and Re number) were investigated and optimized in each pipeline using response surface method. The drag reduction in 1/2" galvanized, 3/4" galvanized, 1/2" five-layer and 1/2" cuprous pipelines was found 99.1%, 92.5%, 87.6% and 85.2%, respectively. The model adequacy was measured using ANOVA. Based on the high determination coefficient, more than 95% of variance of experimental data in all pipelines was described by quadratic model.

关键词: Drag reduction, Lecithin, Functionalized magnetic nanophotocatalyst, Turbulent flow, Response surface