Experimental investigation of bubble dynamics near the bilge with a circular opening

Cui, Pu; Zhang, A‐Man; Wang, Shiping; Qianxi, Wang

doi:10.1016/j.apor.2013.03.002

Cited by 38 publications

(10 citation statements)

References 25 publications

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“…However, the dynamic characteristics of bubbles have been widely utilized in various engineering fields for applications, such as ultrasonic cleaning [5] , [6] , [7] , shock lithotripsy [8] , [9] , and air-gun detection [10] . The interaction between bubbles and incomplete boundaries is a complicated problem worthy of investigation [11] , [12] , [13] , [14] . In the field of underwater explosions, an oscillating bubble may induce high speed inrushing water through the opening and impact the inner structures of the ship, causing secondary damage [15] .…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, previous researches have been limited to the coupling behavior of the bubbles to the incomplete boundary in the case of double-sided immersion of the opening by the water. Cui [40] conducted an experimental study of incomplete bilge boundaries with breakouts to analyse the bubble pulsations and loading characteristics. These experiments may be different from an actual underwater explosion; thus, we innovatively improved our experimental setup.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental study of bubble dynamics in the neighbourhood of a vertical incomplete boundary

Cui

Zhou

Huang

et al. 2021

Ultrasonics Sonochemistry

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental study of bubble dynamics in the neighbourhood of a vertical incomplete boundary

Cui

Zhou

Huang

et al. 2021

Ultrasonics Sonochemistry

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“…It is shown that the curvature of the rigid boundary can significantly influence the collapse of a nearby laser-generated bubble. For the boundary with curvature, the oscillation features of the UNDEX bubble near a bilge with a circle opening are studied experimentally under the help of electric-spark-generated bubbles and HSV [16]. Li et al [17][18][19] combined the bubble-structure interaction model of the fully coupled model to study the bubble-sphere interaction near the free surface and proposed a three-dimensional model of the interaction between the ball and the nearly hemispherical bubble attached to the surface of the sphere.…”

Section: Introductionmentioning

confidence: 99%

A New Measurement Based on HPB to Measure the Wall Pressure of Electric-Spark-Generated Bubble near the Hemispheric Boundary

Shi

Cui

et al. 2020

Shock and Vibration

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Direct measurement of the wall pressure loading of the spherical boundary subjected to the near-field underwater explosion is a great difficulty. To investigate the wall pressure caused by electric-spark-generated bubble near a hemispheric boundary, an experiment system is developed. In the method of this experiment, a Hopkinson bar (HPB), used as the sensing element, is inserted through the hole drilled on the hemisphere target and the bar’s measuring end face lies flush with the loaded face of the hemisphere target to detect and record the pressure loading. The semiconductor strain gauges which stick on Hopkinson bar are used to convert the pressure-based signal to the strain wave signal. The bubble in the experiments is formed by a discharge of 400 V high voltage. To validate the pressure measurement technique based on the HPB, an experimental result from pressure transducer is used as the validating system. To verify the capability of this new methodology and experimental system, a series of electric-spark-generated bubble experiments are conducted. From the recorded pressure-time profiles coupled with the underwater explosion evolution images captured by the high-speed camera (HSV), the shock wave pressure loading and bubble collapse pressure loadings are captured in detail at different dimensionless stand-off distances γ from 0.17 to 2.00. From the results of the experiments conducted in this paper, the proposed experiment system can be used to measure the pressure signal successfully, giving new way to study the bubble collapse pressure when the bubble is near a hemispheric boundary. Through the experimental results, the bubbles generated by different dimensionless stand-off distance γ are divided into four categories, and the bubble load characteristics are also discussed.

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“…The dynamics of compressible multifluid flows is of significant importance in many engineering applications, such as underwater explosion, 1-3 cavitation bubble collapse in water, [4][5][6] high-speed flows with droplets, 7,8 and combustion systems involving fuel drops in high-speed airflow. 9,10 Numerical simulation of compressible multifluid flows is still a challenge, especially when the property difference across the material interface is large or the interface is impacted by a strong shock wave.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of compressible multifluid flows using an adaptive positivity‐preserving RKDG‐GFM approach

Zhang

et al. 2019

Numerical Methods in Fluids

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Summary The Runge‐Kutta discontinuous Galerkin method together with a refined real‐ghost fluid method is incorporated into an adaptive mesh refinement environment for solving compressible multifluid flows, where the level set method is used to capture the moving material interface. To ensure that the Riemann problem is exactly along the normal direction of the material interface, a simple and efficient modification is introduced into the original real‐ghost fluid method for constructing the interfacial Riemann problem, and the initial conditions of the Riemann problem are obtained directly from the solution polynomials of the discontinuous Galerkin finite element space. In addition, a positivity‐preserving limiter is introduced into the Runge‐Kutta discontinuous Galerkin method to suppress the failure of preserving positivity of density or pressure for the problems involving strong shock wave or shock interaction with material interface. For interfacial cells in adaptive mesh refinement, the data transfer between different grid levels is achieved by using a L2 projection approach along with the least squares fitting. Various numerical cases, including multifluid shock tubes, underwater explosions, and shock‐induced collapse of a underwater air bubble, are computed to assess the capability of the present adaptive positivity‐preserving RKDG‐GFM approach, and the simulated results show that the present approach is quite robust and can provide relatively reasonable results across a wide variety of flow regimes, even for problems involving strong shock wave or shock wave impacting high acoustic impedance mismatch material interface.

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Experimental investigation of bubble dynamics near the bilge with a circular opening

Cited by 38 publications

References 25 publications

Experimental study of bubble dynamics in the neighbourhood of a vertical incomplete boundary

Experimental study of bubble dynamics in the neighbourhood of a vertical incomplete boundary

A New Measurement Based on HPB to Measure the Wall Pressure of Electric-Spark-Generated Bubble near the Hemispheric Boundary

Numerical simulation of compressible multifluid flows using an adaptive positivity‐preserving RKDG‐GFM approach

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