On drag reduction in a two-phase flow

E. Ya Gatapova, Vladimir Sergeevich Ajaev, O. A. Kabov

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Bubbles collected on a local hydrophobic surface with nanocoating in a two-phase flow in a minichannel have been detected experimentally. It has been proposed to use the effect of concentration of gas bubbles on hydrophobic segments of the surface of the channel with contrast wettability for ensuring drag reduction. A two-dimensional flow model with the Navier slip condition in the region of the bubble layer gives criteria of drag reduction, depending on the slip length, dimension of bubbles, and dimension of the segment with nanocoating. The presence of the bubble layer on half of the surface of the channel can increase the flow rate of a liquid flowing through the channel by 40% at a fixed pressure gradient.

Original languageEnglish
Pages (from-to)160-163
Number of pages4
JournalJETP Letters
Volume101
Issue number3
DOIs
Publication statusPublished - 1 Feb 2015

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drag reduction
two phase flow
bubbles
slip
two dimensional flow
wettability
pressure gradients
flow velocity
liquids
gases

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

On drag reduction in a two-phase flow. / Gatapova, E. Ya; Ajaev, Vladimir Sergeevich; Kabov, O. A.

In: JETP Letters, Vol. 101, No. 3, 01.02.2015, p. 160-163.

Research output: Contribution to journalArticle

Gatapova, E. Ya ; Ajaev, Vladimir Sergeevich ; Kabov, O. A. / On drag reduction in a two-phase flow. In: JETP Letters. 2015 ; Vol. 101, No. 3. pp. 160-163.
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