PARTICLE–FREE AIR BUBBLE INTERACTION IN LIQUID

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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Experimental Study on the Behavior of a Bubble in the Vicinity of an Air Bubble Attached to a Fixed Structure

Volume 6A: Ocean Engineering ◽

10.1115/omae2020-18144 ◽

2020 ◽

Author(s):

Jia-xia Wang ◽

Kun Liu

Keyword(s):

Deformation Property ◽

Low Voltage ◽

Volume Ratio ◽

Complex Phenomenon ◽

Air Bubble ◽

Large Numbers ◽

Bubble Interaction ◽

Fixed Structure ◽

Bubble Splitting ◽

Distance Parameter

Abstract The interaction between a spark-generated bubble and a non-oscillating air bubble attached to a horizontal rigid plate is investigated using a low-voltage spark-discharge setup. Large numbers of fascinating and complicated interactions are given rise during two bubble coupling pulsation due to the deformation property endowed to the plate through an air bubble attached. It is found that, under the combined influence of the cavitation and the structure, some complex phenomenon likes the bubble coalescence, air bubble skirt phenomenon, bubble splitting are given rise during the two bubble interaction procedure. The coupling phenomenon between the spark generated bubble, air bubble and the structure are discussed in detailed The mainly attention are paid to the coupled response of an attached quiescent bubble under oscillating bubble, the effect of the distance parameter and volume ratio parameter on the air bubble shapes are analyzed in detail, and the mechanism behind these phenomenon are investigated. Our study can be a useful scheme in the protection of a naval structure from threats induced by an explosion bubble impact loading.

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Air bubble interaction with a submerged, axisymmetric water jet.

The Journal of the Acoustical Society of America ◽

10.1121/1.401044 ◽

1991 ◽

Vol 90 (4) ◽

pp. 2318-2318

Author(s):

Sean M. Cordry ◽

Ronald A. Roy ◽

Lawrence A. Crum

Keyword(s):

Water Jet ◽

Air Bubble ◽

Bubble Interaction

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PTRAC File Utilization for Calculation of Free-Air Ionization Chamber Correction Factors by MCNPX

SNA + MC 2013 - Joint International Conference on Supercomputing in Nuclear Applications + Monte Carlo ◽

10.1051/snamc/201405125 ◽

2014 ◽

Author(s):

Jaroslav Šolc ◽

Vladimír Sochor

Keyword(s):

Ionization Chamber ◽

Correction Factors ◽

Free Air ◽

Air Ionization

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ASSESSMENT OF ANATOMICAL & FUNCTIONAL SUCCESS IN EXTERNAL DACRYOCYSTORHINOSTOMY BY AIR BUBBLE TEST

International Journal of Medical and Biomedical Studies ◽

10.32553/ijmbs.v3i9.535 ◽

2019 ◽

Vol 3 (9) ◽

Author(s):

Dr. Vikas Tantuway

Keyword(s):

Case Series ◽

Invasive Procedure ◽

Nasolacrimal Duct ◽

Good Tool ◽

Predictive Values ◽

Reliability Indices ◽

Air Bubble ◽

Bubble Test ◽

External Dacryocystorhinostomy ◽

Anatomical Success

Aim: To assess reliability indices of Air Bubble Test (ABT) for anatomical and functional success in external Dacryocystorhinostomy (DCR). Methods: Prospective case series of nasolacrimal duct obstruction underwent DCR. Functional success defined as Munk score 0 & 1 & anatomical success as free irrigation at followup.ABT performed by putting antibiotic drops into eye& asking patient to exhale while keeping nose & mouth closed. Formation of bubbles at punctum considered as positive test. Specificity, sensitivity, positive & negative predictive values calculated. Results: There were 103 DCR in 97 patients(23 male,74 female)with mean age 45.56 yr. Anatomical and functional success was 99.02% & 98.05%, respectively.ABT showed sensitivity 96.07%, specificity 100% for anatomical success after DCR. Sensitivity and specificity were 97.02% & 100% for functional success. Conclusion: As non-invasive procedure ABT is a good tool to assess success of DCR, though lacrimal syringing remains the gold standard. Keywords: Anatomical, Dacryocystorhinostomy & Air Bubble Test.

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