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

Producción científica: Contribución a una revista › Artículo › revisión exhaustiva

17 Citas (Scopus)

Resumen

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.

Idioma original	Inglés
Páginas (desde-hasta)	1113041-1113048
Número de páginas	8
Publicación	Journal of Fluids Engineering, Transactions of the ASME
Volumen	130
N.º	11
DOI	https://doi.org/10.1115/1.2969444
Estado	Publicada - nov. 2008
Publicado de forma externa	Sí

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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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Turbulence structure modification and drag reduction by microbubble injections in a boundary layer channel flow. / Gutiérrez-Torres, C. C.; Hassan, Y. A.; Jimenez-Bernal, J. A.
En: Journal of Fluids Engineering, Transactions of the ASME, Vol. 130, N.º 11, 11.2008, p. 1113041-1113048.

Producción científica: Contribución a una revista › Artículo › revisión exhaustiva

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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.

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KW - Drag reduction

KW - Microbubbles

KW - PIV

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

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