Drag reduction by microbubble injection in a channel flow

Authors

  • C. del C
  • Y.A. Hassan
  • J.A. Jiménez Bernal
  • J.G. Barbosa Saldaña

Keywords:

Microbubbles, drag reduction, channel flow

Abstract

The injection of microbubbles within the turbulent boundary layer in a channel is investigated to elucidate the drag reduction phenomenon. Experimental data for a fully developed flow were obtained using the Particle Image Velocimetry (PIV) technique for single-and two-phase flow. Both cases are compared to examine the effects of the presence of microbubbles within the boundary layer, specifically the modification of vorticity, vortex structures, and fluctuating rate of strain, which is directly related to the energy dissipation in turbulent flows. A notorious decrease in the rate of strain as well as vorticity was observed for the two-phase flow. These results are significant and will help to reveal the physical mechanism of drag reduction by injection of microbubbles.

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Published

2008-01-01

How to Cite

[1]
C. del C, Y. Hassan, J. Jiménez Bernal, and J. Barbosa Saldaña, “Drag reduction by microbubble injection in a channel flow”, Rev. Mex. Fís., vol. 54, no. 1, pp. 8–0, Jan. 2008.

Issue

Vol. 54 No. 1 (2008): Revista Mexicana de Física.

Section

Articles

License

Authors retain copyright and grant the Revista Mexicana de Física right of first publication with the work simultaneously licensed under a CC BY-NC-ND 4.0 that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.