The Effect of Surface Geometry of Solid Wall On the Collapse of a Cavitation Bubble

2021 ◽  
Author(s):  
Yurong Sun ◽  
Yuxin Du ◽  
Zhifeng Yao ◽  
Qiang Zhong ◽  
Siyuan Geng ◽  
...  
Keyword(s):  
Cavitation Bubble ◽  
Solid Wall ◽  
Vertical Wall ◽  
Great Influence ◽  
Morphological Characteristics ◽  
Bubble Collapse ◽  
Surface Geometry ◽  
Geometric Conditions ◽  
Collapse Time ◽  
Dimensionless Ratio

Abstract The objective of this paper is to reveal the influence of different surface geometric conditions on the dynamic behavior characteristics of a laser-induced bubble collapse. A high-speed camera system was used to record the oscillation process of the laser-induced bubble on plane solid walls with different roughness and a wall containing reentrant cavities full of water or gas. The focus is on the quantitative analysis of the morphological characteristics of the cavitation bubble near the solid wall under different surface forms during the first two oscillation period. The results show that the dimensionless ratio γ, defined as the distance from the center of the bubble to the wall divided by the maximum radius of the bubble, has a great influence on the change of the cavitation shape in the direction of the vertical wall. Different surface geometries without gas in our cases have no significant effect on the collapse time of cavitation bubbles. While for the surface containing gas, the direction of movement of the bubble accompanying the micro-jet will greatly change during the collapse of the cavitation bubble, and the collapse time seems to be independent of the dimensionless ratio γ. These achievements shed the light for the engineering to avoid the damage of the micro-jet caused by design suitable surface geometry.

Modeling of collapsing cavitation bubble near solid wall by 3D pseudopotential multi-relaxation-time lattice Boltzmann method

2017 ◽  
Vol 232 (3) ◽  
pp. 445-456 ◽  
Author(s):  
Minglei Shan ◽  
Yu Yang ◽  
Hao Peng ◽  
Qingbang Han ◽  
Changping Zhu
Keyword(s):  
Relaxation Time ◽  
Lattice Boltzmann ◽  
Cavitation Bubble ◽  
Solid Wall ◽  
Three Dimensional ◽  
Lattice Boltzmann Model ◽  
Bubble Collapse ◽  
Lattice Boltzmann Simulation ◽  
Boltzmann Method ◽  
Boltzmann Model

Understanding the dynamic characteristic of the cavitation bubble near a solid wall is a fundamental issue for the bubble collapse application and prevention. In the present work, an improved three-dimensional multi-relaxation-time pseudopotential lattice Boltzmann model is adopted to investigate the cavitation bubble collapse near the solid wall. With respect to thermodynamic consistency, Laplace law verification, the three-dimensional pseudopotential multi-relaxation-time lattice Boltzmann model is investigated. By the theoretical analysis, it is proved that the model can be regarded as a solver of the Rayleigh–Plesset equation, and confirmed by comparing the results of the lattice Boltzmann simulation and the Rayleigh–Plesset equation calculation for the case of cavitation bubble collapse in the infinite medium field. The bubble collapse near the solid wall is modeled using the improved pseudopotential multi-relaxation-time lattice Boltzmann model. We find the lattice Boltzmann simulation and the experimental results have the same dynamic process by comparing the bubble profiles evolution. Form the pressure field and the velocity field evolution it is found that the tapered higher pressure region formed near the top of the bubble is a crucial driving force inducing the bubble collapse. This exploratory research demonstrates that the lattice Boltzmann method is an alternative tool for the study of the interaction between collapsing cavitation bubble and matter.

scholarly journals Design of experimental setup for investigation of cavitation bubble collapse close to a solid wall

2012 ◽  
Vol 25 ◽  
pp. 02017
Author(s):  
Miloš Müller ◽  
Patrik Zima ◽  
Jiří Unger ◽  
Martin Živný
Keyword(s):  
Cavitation Bubble ◽  
Solid Wall ◽  
Bubble Collapse ◽  
Experimental Setup

The Collapse of a Gas Bubble near a Solid Wall by a Shock Wave and the Induced Impulsive Pressure

1984 ◽  
Vol 198 (2) ◽  
pp. 81-86 ◽  
Author(s):  
A Shima ◽  
Y. Tomita ◽  
K Takahashi
Keyword(s):  
Shock Wave ◽  
Experimental Study ◽  
Cavitation Bubble ◽  
Solid Wall ◽  
Impact Pressure ◽  
Bubble Collapse ◽  
Gas Bubble ◽  
Bubble Interaction ◽  
The Impact ◽  
Impulsive Pressure

An experimental study concerning the shock wave—bubble interaction was conducted in order to obtain a unified consideration of the mechanism of the impulsive pressure generation induced by the cavitation bubble collapse. It was found that the relation between the maximum impulsive pressure, pG, max, and the relative distance, lc/Re, is closely similar to the known result obtained from a single spark-generated bubble, and that a gas bubble within the region of lc/Re ≤ 7 behaves as a source capable of generating more intensive impulsive pressure than the impact pressure induced by a shock wave impinging directly on a solid wall without the presence of a gas bubble.

scholarly journals Retardant Effects of Collapsing Dynamics of a Laser-Induced Cavitation Bubble Near a Solid Wall

Symmetry ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1051
Author(s):  
Li ◽  
Duan ◽  
Zhang ◽  
Tang ◽  
Zhang
Keyword(s):  
Data Analysis ◽  
Cavitation Bubble ◽  
High Speed ◽  
Solid Wall ◽  
Bubble Collapse ◽  
High Speed Photography ◽  
Bubble Wall ◽  
Interface Evolution ◽  
Wall Distance ◽  
Dramatic Difference

In the present paper, the dynamic behavior of cavitation bubbles near a wall is experimentally investigated with a focus on the retardant effects of the wall on the collapsing dynamics of the bubble. In the present experiments, a cavitation bubble is generated by a focused laser beam with its behavior recorded through high-speed photography. During the data analysis, the influences of non-dimensional bubble–wall distance on the bubble collapsing dynamics are qualitatively and quantitatively investigated in terms of the interface evolution, the velocities of the poles, and the movement of the bubble centroid. Our results reveal that the presence of the wall could significantly affect the collapsing characteristics, leading to a dramatic difference between the moving velocities of interfaces near and away from the wall. With the decrease of the bubble–wall distance, the effects will be gradually strengthened with a rapid movement of the bubble centroid during the final collapse. Finally, a physical interpretation of the phenomenon is given based on the bubble theory, together with a rough estimation of the induced water hammer pressure by the bubble collapse.

Study on bubble collapse near a solid wall under different hypergravity environments

2021 ◽  
Vol 221 ◽  
pp. 108563
Author(s):  
Liangtao Liu ◽  
Ning Gan ◽  
Jinxiang Wang ◽  
Yifan Zhang
Keyword(s):  
Solid Wall ◽  
Bubble Collapse

scholarly journals Effect of Morphological Characteristics and Biomineralization of 3D-Printed Gelatin/Hyaluronic Acid/Hydroxyapatite Composite Scaffolds on Bone Tissue Regeneration

2021 ◽  
Vol 22 (13) ◽  
pp. 6794
Author(s):  
Jae-Woo Kim ◽  
Yoon-Soo Han ◽  
Hyun-Mee Lee ◽  
Jin-Kyung Kim ◽  
Young-Jin Kim
Keyword(s):  
Hyaluronic Acid ◽  
Bone Tissue ◽  
Double Layer ◽  
Tissue Regeneration ◽  
Great Influence ◽  
Morphological Characteristics ◽  
Bone Tissue Regeneration ◽  
Hierarchical Architecture ◽  
Uniform Structure ◽  
Composite Scaffolds

The use of porous three-dimensional (3D) composite scaffolds has attracted great attention in bone tissue engineering applications because they closely simulate the major features of the natural extracellular matrix (ECM) of bone. This study aimed to prepare biomimetic composite scaffolds via a simple 3D printing of gelatin/hyaluronic acid (HA)/hydroxyapatite (HAp) and subsequent biomineralization for improved bone tissue regeneration. The resulting scaffolds exhibited uniform structure and homogeneous pore distribution. In addition, the microstructures of the composite scaffolds showed an ECM-mimetic structure with a wrinkled internal surface and a porous hierarchical architecture. The results of bioactivity assays proved that the morphological characteristics and biomineralization of the composite scaffolds influenced cell proliferation and osteogenic differentiation. In particular, the biomineralized gelatin/HA/HAp composite scaffolds with double-layer staggered orthogonal (GEHA20-ZZS) and double-layer alternative structure (GEHA20-45S) showed higher bioactivity than other scaffolds. According to these results, biomineralization has a great influence on the biological activity of cells. Hence, the biomineralized composite scaffolds can be used as new bone scaffolds in bone regeneration.

Fluid–structure modelling for material deformation during cavitation bubble collapse

2021 ◽  
Vol 106 ◽  
pp. 103370
Author(s):  
Prasanta Sarkar ◽  
Giovanni Ghigliotti ◽  
Jean-Pierre Franc ◽  
Marc Fivel
Keyword(s):  
Cavitation Bubble ◽  
Bubble Collapse ◽  
Fluid Structure ◽  
Material Deformation

scholarly journals Virtual Simulation of the Effects of Intracranial Fluid Cavitation in Blast-Induced Traumatic Brain Injury

2015 ◽  
Author(s):  
Shivonne Haniff ◽  
Paul Taylor ◽  
Aaron Brundage ◽  
Damon Burnett ◽  
Candice Cooper ◽  
...  
Keyword(s):  
Traumatic Brain Injury ◽  
Brain Injury ◽  
Cavitation Bubble ◽  
Superior Sagittal Sinus ◽  
Von Mises Stress ◽  
Bubble Collapse ◽  
Compressive Wave ◽  
Sagittal Sinus ◽  
Microscale Model ◽  
Von Mises

A microscale model of the brain was developed in order to understand the details of intracranial fluid cavitation and the damage mechanisms associated with cavitation bubble collapse due to blast-induced traumatic brain injury (TBI). Our macroscale model predicted cavitation in regions of high concentration of cerebrospinal fluid (CSF) and blood. The results from this macroscale simulation directed the development of the microscale model of the superior sagittal sinus (SSS) region. The microscale model includes layers of scalp, skull, dura, superior sagittal sinus, falx, arachnoid, subarachnoid spacing, pia, and gray matter. We conducted numerical simulations to understand the effects of a blast load applied to the scalp with the pressure wave propagating through the layers and eventually causing the cavitation bubbles to collapse. Collapse of these bubbles creates spikes in pressure and von Mises stress downstream from the bubble locations. We investigate the influence of cavitation bubble size, compressive wave amplitude, and internal bubble pressure. The results indicate that these factors may contribute to a greater downstream pressure and von Mises stress which could lead to significant tissue damage.

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