Study of collaborative drag reduction effect of surfactant solution and longitudinal microgroove channel

WEI Jinjia1 HUANG Chonghai1 YU Bo2

(1.State Key Laboratory of Multiphase Flow in Power Engineering, School of Chemical Engineering and Technology, Xi’an Jiaotong University, Xi’an, Shaanxi, China 710049)
(2.Beijing Institute of Petrochemical Technology, Beijing, China 102617)

【Abstract】A systematic study on the turbulent flow of surfactant solutions in different wide-rib rectangular microgroove channels was carried out by direct numerical simulation. The results show that the drag reduction performance of surfactant solutions can be further enhanced in the microgroove channel with a suitable groove size. The optimal size of microgroove for drag reduction can be enlarged in the surfactant solution. The collaborative drag reduction effect of surfactant solution in microgroove channel is mainly the competition result of the “restriction effect” and the “tip effect” of the microgroove. There is a higher shear stress near the grooved tips, but the stress is very small within the grooved valley. If the microgroove not only prevents the near-wall vortices from intruding into the grooved valley effectively, but also presents a better restriction effect on the spanwise motions of the near-wall streamwise vortices, the microgroove will show a drag reduction enhancement effect. On the contrary, if the size of microgroove increases too large to prevent the near-wall vortices from intruding into the grooved valley, the shear stress near grooved tip and within grooved valley will increase, and the microgroove will show drag-increasing performance. The fact that a large number of small and weak secondary streamwise vortices are induced in the grooved valley is the key factor to increase the restriction effect and thus enhance the drag reduction of surfactant solution.

【Keywords】 surfactants; turbulent flow; microgroove; numerical simulation; collaborative drag reduction;


【Funds】 National Natural Science Foundation of China (51225601) Fundamental Research Funds For the Central Universities (cxtd2017004)

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(Translated by CHENG QZ)


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This Article


CN: 11-1946/TQ

Vol 69, No. 01, Pages 472-482+534

January 2018


Article Outline


  • Introduction
  • 1 Numerical simulation process
  • 2 Results and discussion
  • 3 Conclusions
  • Symbol description
  • References