scholarly journals Pressure Wave Propagation with Bubble Breakup Phenomena in a Venturi Tube

2014 ◽  
Vol 27 (5) ◽  
pp. 531-538 ◽  
Author(s):  
Shin-ichiro UESAWA ◽  
Akiko KANEKO ◽  
Naoya TAMURA ◽  
Yosuke NAKABAYASHI ◽  
Yutaka ABE
Keyword(s):  
Wave Propagation ◽  
Pressure Wave ◽  
Venturi Tube ◽  
Bubble Breakup

Pressure Wave Propagation with Bubble Collapse in a Venturi Tube

2018 ◽  
Vol 2018.24 (0) ◽  
pp. OS0501
Author(s):  
Keita FUJII ◽  
Akiko KANEKO ◽  
Yutaka ABE ◽  
Masatoshi IKE
Keyword(s):  
Wave Propagation ◽  
Pressure Wave ◽  
Venturi Tube ◽  
Bubble Collapse

scholarly journals Pressure wave propagation in a granular bed

2005 ◽  
Vol 72 (3) ◽  
Author(s):  
Stephen R. Hostler ◽  
Christopher E. Brennen
Keyword(s):  
Wave Propagation ◽  
Pressure Wave ◽  
Granular Bed

scholarly journals Pressure wave propagation in bubbly liquid.

1990 ◽  
Vol 56 (525) ◽  
pp. 1237-1243
Author(s):  
Yoichro MATSUMOTO ◽  
Hideji NISHIKAWA ◽  
Hideo OHASHI
Keyword(s):  
Wave Propagation ◽  
Pressure Wave ◽  
Bubbly Liquid

Bubble Breakup Phenomena in a Venturi Tube

2007 ◽  
Author(s):  
A. Fujiwara ◽  
K. Okamoto ◽  
K. Hashiguchi ◽  
J. Peixinho ◽  
S. Takagi ◽  
...  
Keyword(s):  
High Speed ◽  
Bubbly Flow ◽  
Bubble Diameter ◽  
Pressure Change ◽  
Venturi Tube ◽  
Large Bubble ◽  
Breakup Process ◽  
Bubble Behavior ◽  
Bubble Breakup ◽  
Unstable Surface

Microbubble generation techniques have been proposed in former investigations. Here, we study an effective technique using air bubbly flow into a convergent-divergent nozzle (venturi tube). Pressure change in the diverging section induces bubble breakup. The purpose of this study is to clarify the effect of flow velocity at the throat with respect to the bubble breakup process and the bubble behavior in a venturi tube. Relations between generated bubble diameter and bubble breakup process are also described. Using high speed camera for detailed observation of bubble behavior, the following features were obtained. The velocity at the throat is expected to be of the order of the magnitude of the speed of sound of bubbly flow and a drastic bubble expansion and a shrink is induced. Besides, a liquid column appeared after the bubble flowing into the throat, and it grew up to stick to the bubble like in the form of a jet. This jet induced both unstable surface waves and the breakup of a single large bubble into several pieces.

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