Turbulence structure modification and drag reduction by microbubble injections in a boundary layer channel flow

C. C. Gutiérrez-Torres; Y. A. Hassan; J. A. Jimenez-Bernal

doi:10.1115/1.2969444

Turbulence structure modification and drag reduction by microbubble injections in a boundary layer channel flow

C. C. Gutiérrez-Torres, Y. A. Hassan, J. A. Jimenez-Bernal

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

Abstract

Turbulent boundary layer modification in a channel flow using injection of microbubbles as a means to achieve drag reduction was studied. The physical mechanism of this phenomenon is not yet fully understood. To obtain some information related to this phenomenon, single-phase (pure water) flow and two-phase (water and microbubbles) channel flow measurements are taken. The void fraction conditions were varied while maintaining a Reynolds number of 5128 based on the half channel height. The study indicates that the presence of microbubbles within the boundary layer modifies the turbulence structure such that variations in time and space turbulent scales are observed, as well as ejection and sweep phenomena.

Original language	English
Pages (from-to)	1113041-1113048
Number of pages	8
Journal	Journal of Fluids Engineering, Transactions of the ASME
Volume	130
Issue number	11
DOIs	https://doi.org/10.1115/1.2969444
State	Published - Nov 2008
Externally published	Yes

Keywords

Channel flow
Drag reduction
Microbubbles
PIV

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abstract = "Turbulent boundary layer modification in a channel flow using injection of microbubbles as a means to achieve drag reduction was studied. The physical mechanism of this phenomenon is not yet fully understood. To obtain some information related to this phenomenon, single-phase (pure water) flow and two-phase (water and microbubbles) channel flow measurements are taken. The void fraction conditions were varied while maintaining a Reynolds number of 5128 based on the half channel height. The study indicates that the presence of microbubbles within the boundary layer modifies the turbulence structure such that variations in time and space turbulent scales are observed, as well as ejection and sweep phenomena.",

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AU - Gutiérrez-Torres, C. C.

AU - Hassan, Y. A.

AU - Jimenez-Bernal, J. A.

PY - 2008/11

Y1 - 2008/11

N2 - Turbulent boundary layer modification in a channel flow using injection of microbubbles as a means to achieve drag reduction was studied. The physical mechanism of this phenomenon is not yet fully understood. To obtain some information related to this phenomenon, single-phase (pure water) flow and two-phase (water and microbubbles) channel flow measurements are taken. The void fraction conditions were varied while maintaining a Reynolds number of 5128 based on the half channel height. The study indicates that the presence of microbubbles within the boundary layer modifies the turbulence structure such that variations in time and space turbulent scales are observed, as well as ejection and sweep phenomena.

AB - Turbulent boundary layer modification in a channel flow using injection of microbubbles as a means to achieve drag reduction was studied. The physical mechanism of this phenomenon is not yet fully understood. To obtain some information related to this phenomenon, single-phase (pure water) flow and two-phase (water and microbubbles) channel flow measurements are taken. The void fraction conditions were varied while maintaining a Reynolds number of 5128 based on the half channel height. The study indicates that the presence of microbubbles within the boundary layer modifies the turbulence structure such that variations in time and space turbulent scales are observed, as well as ejection and sweep phenomena.

KW - Channel flow

KW - Drag reduction

KW - Microbubbles

KW - PIV

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JF - Journal of Fluids Engineering, Transactions of the ASME

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Turbulence structure modification and drag reduction by microbubble injections in a boundary layer channel flow

Abstract

Keywords

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