Power spectral distributions of pseudo-turbulent bubbly flows

被引：50

作者：

Mendez-Diaz, S. ^{[1
]}

Serrano-Garcia, J. C. ^{[2
]}

Zenit, R. ^{[2
]}

Hernandez-Cordero, J. A. ^{[2
]}

机构：

[1] Univ Autonoma Nuevo Leon, Fac Ingn Mecan & Elect, San Nicolas De Los Garza 46451, Nuevo Leon, Mexico

[2] Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, Mexico

来源：

PHYSICS OF FLUIDS | 2013年 / 25卷 / 04期

关键词：

VELOCITY; COLUMN; LIQUID;

D O I：

10.1063/1.4800782

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

An experimental study was carried out to determinate the power spectral density (PSD) of mono-dispersed bubbly flows in a vertical channel using flying hot-film anemometry. To improve bubble detection, optical fibers were installed in close proximity to the anemometer sensing element; in this way, the collisions of bubbles with the probe can be detected and removed from the signal. Measurements were performed with gas fractions up to 6%. The PSD distributions were found to decay with a power of -3, in agreement with previous studies, but for a much wider range of Reynolds and Weber numbers. Our measurements indicate that the power decay does not depend strongly on the nature of hydrodynamic interactions among bubbles. (C) 2013 AIP Publishing LLC. [http://dx.doi.org/10.1063/1.4800782]

引用

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