Numerical Investigation of Bubble Interaction Mechanisms in Gas-Liquid Bubbly Flows: Harmonisation of Bubble Breakup and Coalescence Effects

The entrainment, breakup, and interplay of air bubbles were observed in a vertical, two-dimensional supported jet at low impact velocities. Ultra-high-speed movies were analyzed both qualitatively and quantitatively. The onset velocity of bubble entrainment was between 0.9 and 1.1 m/s. Most bubbles were entrained as detached bubbles from elongated air cavities at the impingement point. Explosion, stretching, and dejection mechanisms were observed for individual bubble breakup, and the bubble interaction behaviors encompassed bubble rebound, “kiss-and-go,” coalescence and breakup induced by approaching bubble(s). The effects of jet impact velocity on the bubble behaviors were investigated for impact velocities from 1.0 to 1.36 m/s, in the presence of a shear flow environment.

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Numerical investigation on interaction mechanisms between flow field and electromagnetic field for nonequilibrium inductively coupled plasma

Acta Physica Sinica ◽

10.7498/aps.68.20190865 ◽

2019 ◽

Vol 68 (18) ◽

pp. 185202

Author(s):

Ming-Hao Yu

Keyword(s):

Electromagnetic Field ◽

Flow Field ◽

Numerical Investigation ◽

Inductively Coupled Plasma ◽

Interaction Mechanisms ◽

Inductively Coupled

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Numerical Investigation of Three-Dimensional Clocking Effects in a Low Pressure Turbine

Volume 6: Turbo Expo 2003, Parts A and B ◽

10.1115/gt2003-38414 ◽

2003 ◽

Cited By ~ 3

Author(s):

Andrea Arnone ◽

Michele Marconcini ◽

Alberto Scotti Del Greco ◽

Ennio Spano

Keyword(s):

Numerical Investigation ◽

Dimensional Analysis ◽

Relative Position ◽

Three Dimensional ◽

Low Pressure ◽

Blade Height ◽

Interaction Mechanisms ◽

Low Pressure Turbine ◽

Wake Interaction

One and a half stages of a low pressure turbine were investigated using a three-dimensional, time-accurate, viscous solver. Unsteady analyses were carried out by varying the circumferential relative position of consecutive vanes to study the effects of clocking on performance. Assuming that efficiency improvements by clocking are linked to the wake tangential position with respect to the successive blade, a certain circumferential shift in this position can be observed along the blade height due to blade twist and non-radial stacking, giving different contributions. In order to assess this phenomenon, results from three-dimensional computations were compared with a quasi three-dimensional analysis at mid-span. The effects of clocking on wake interaction mechanisms and unsteady blade loadings are presented and discussed.

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558 A study on numerical bubble-interaction model in micro-bubbly flows

The Proceedings of The Computational Mechanics Conference ◽

10.1299/jsmecmd.2001.14.649 ◽

2001 ◽

Vol 2001.14 (0) ◽

pp. 649-650

Author(s):

Tomotaka FUKAMI ◽

Tomoaki KUNUGI ◽

Akimi SERIZAWA

Keyword(s):

Interaction Model ◽

Bubbly Flows ◽

Bubble Interaction

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Investigation and modeling of bubble-bubble interaction effect in homogeneous bubbly flows

Physics of Fluids ◽

10.1063/1.3432503 ◽

2010 ◽

Vol 22 (6) ◽

pp. 063302 ◽

Cited By ~ 29

Author(s):

Jung Hee Seo ◽

Sanjiva K. Lele ◽

Gretar Tryggvason

Keyword(s):

Interaction Effect ◽

Bubbly Flows ◽

Bubble Interaction

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Numerical Investigation of Three-Dimensional Clocking Effects in a Low Pressure Turbine

Journal of Turbomachinery ◽

10.1115/1.1740780 ◽

2004 ◽

Vol 126 (3) ◽

pp. 375-384 ◽

Cited By ~ 12

Author(s):

Andrea Arnone ◽

Michele Marconcini ◽

Alberto Scotti Del Greco ◽

Ennio Spano

Keyword(s):

Numerical Investigation ◽

Dimensional Analysis ◽

Relative Position ◽

Three Dimensional ◽

Low Pressure ◽

Blade Height ◽

Interaction Mechanisms ◽

Low Pressure Turbine ◽

Wake Interaction

One and a half stages of a low pressure turbine were investigated using a three-dimensional time-accurate viscous solver. Unsteady analyses were carried out by varying the circumferential relative position of consecutive vanes to study the effects of clocking on performance. Assuming that efficiency improvements by clocking are linked to the wake tangential position with respect to the successive blade, a certain circumferential shift in this position can be observed along the blade height due to blade twist and nonradial stacking, giving different contributions. In order to assess this phenomenon, results from three-dimensional computations were compared with a quasi-three-dimensional analysis at mid-span. The effects of clocking on wake interaction mechanisms and unsteady blade loadings are presented and discussed.

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