Dynamics of laser-induced cavitation bubble during expansion over sharp-edge geometry submerged in liquid – an inside view by diffuse illumination

Laser ablation in liquids is growing in popularity for various applications including nanoparticle production, breakdown spectroscopy, and surface functionalization. When laser pulse ablates the solid target submerged in liquid, a cavitation bubble develops. In case of “finite” geometries of ablated...

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Main Authors: Matej Senegačnik, Kohei Kunimoto, Satoshi Yamaguchi, Koki Kimura, Tetsuo Sakka, Peter Gregorčič
Format: Article
Language:English
Published: Elsevier 2021-05-01
Series:Ultrasonics Sonochemistry
Subjects:
Online Access:http://www.sciencedirect.com/science/article/pii/S1350417721000018
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spelling doaj-62ea553d23a34bb180d4b760ab9192072021-04-20T05:11:34ZengElsevierUltrasonics Sonochemistry1350-41772021-05-0173105460Dynamics of laser-induced cavitation bubble during expansion over sharp-edge geometry submerged in liquid – an inside view by diffuse illuminationMatej Senegačnik0Kohei Kunimoto1Satoshi Yamaguchi2Koki Kimura3Tetsuo Sakka4Peter Gregorčič5Faculty of Mechanical Engineering, University of Ljubljana, Aškerčeva 6, 1000 Ljubljana, SloveniaDepartment of Energy and Hydrocarbon Chemistry, Kyoto University, Nishikyo, Kyoto 615-8510, JapanDepartment of Energy and Hydrocarbon Chemistry, Kyoto University, Nishikyo, Kyoto 615-8510, JapanDepartment of Energy and Hydrocarbon Chemistry, Kyoto University, Nishikyo, Kyoto 615-8510, JapanDepartment of Energy and Hydrocarbon Chemistry, Kyoto University, Nishikyo, Kyoto 615-8510, JapanFaculty of Mechanical Engineering, University of Ljubljana, Aškerčeva 6, 1000 Ljubljana, Slovenia; Corresponding author.Laser ablation in liquids is growing in popularity for various applications including nanoparticle production, breakdown spectroscopy, and surface functionalization. When laser pulse ablates the solid target submerged in liquid, a cavitation bubble develops. In case of “finite” geometries of ablated solids, liquid dynamical phenomena can occur inside the bubble when the bubble overflows the surface edge. To observe this dynamics, we use diffuse illumination of a flashlamp in combination with a high-speed videography by exposure times down to 250  ns. The developed theoretical modelling and its comparison with the experimental observations clearly prove that this approach widens the observable area inside the bubble. We thereby use it to study the dynamics of laser-induced cavitation bubble during its expansion over a sharp-edge (“cliff-like” 90°) geometry submerged in water, ethanol, and polyethylene glycol 300. The samples are 17  mm wide stainless steel plates with thickness in the range of 0.025–2  mm. Bubbles are induced on the samples by 1064-nm laser pulses with pulse durations of 7–60  ns and pulse energies of 10–55  mJ. We observe formation of a fixed-type secondary cavity behind the edge where low-pressure area develops due to bubble-driven flow of the liquid. This occurs when the velocity of liquid overflow exceeds ~20  m s−1. A re-entrant liquid injection with up to ~40  m s−1 velocity may occur inside the bubble when the bubble overflows the edge of the sample. Formation and characteristics of the jet evidently depend on the relation between the breakdown-edge offset and the bubble energy, as well as the properties of the surrounding liquid. Higher viscosity of the liquid prevents the generation of the jet.http://www.sciencedirect.com/science/article/pii/S1350417721000018Laser ablation in liquidsCavitation bubbleIlluminationShadowgraphyNanoparticle productionRe-entrant jet
collection DOAJ
language English
format Article
sources DOAJ
author Matej Senegačnik
Kohei Kunimoto
Satoshi Yamaguchi
Koki Kimura
Tetsuo Sakka
Peter Gregorčič
spellingShingle Matej Senegačnik
Kohei Kunimoto
Satoshi Yamaguchi
Koki Kimura
Tetsuo Sakka
Peter Gregorčič
Dynamics of laser-induced cavitation bubble during expansion over sharp-edge geometry submerged in liquid – an inside view by diffuse illumination
Ultrasonics Sonochemistry
Laser ablation in liquids
Cavitation bubble
Illumination
Shadowgraphy
Nanoparticle production
Re-entrant jet
author_facet Matej Senegačnik
Kohei Kunimoto
Satoshi Yamaguchi
Koki Kimura
Tetsuo Sakka
Peter Gregorčič
author_sort Matej Senegačnik
title Dynamics of laser-induced cavitation bubble during expansion over sharp-edge geometry submerged in liquid – an inside view by diffuse illumination
title_short Dynamics of laser-induced cavitation bubble during expansion over sharp-edge geometry submerged in liquid – an inside view by diffuse illumination
title_full Dynamics of laser-induced cavitation bubble during expansion over sharp-edge geometry submerged in liquid – an inside view by diffuse illumination
title_fullStr Dynamics of laser-induced cavitation bubble during expansion over sharp-edge geometry submerged in liquid – an inside view by diffuse illumination
title_full_unstemmed Dynamics of laser-induced cavitation bubble during expansion over sharp-edge geometry submerged in liquid – an inside view by diffuse illumination
title_sort dynamics of laser-induced cavitation bubble during expansion over sharp-edge geometry submerged in liquid – an inside view by diffuse illumination
publisher Elsevier
series Ultrasonics Sonochemistry
issn 1350-4177
publishDate 2021-05-01
description Laser ablation in liquids is growing in popularity for various applications including nanoparticle production, breakdown spectroscopy, and surface functionalization. When laser pulse ablates the solid target submerged in liquid, a cavitation bubble develops. In case of “finite” geometries of ablated solids, liquid dynamical phenomena can occur inside the bubble when the bubble overflows the surface edge. To observe this dynamics, we use diffuse illumination of a flashlamp in combination with a high-speed videography by exposure times down to 250  ns. The developed theoretical modelling and its comparison with the experimental observations clearly prove that this approach widens the observable area inside the bubble. We thereby use it to study the dynamics of laser-induced cavitation bubble during its expansion over a sharp-edge (“cliff-like” 90°) geometry submerged in water, ethanol, and polyethylene glycol 300. The samples are 17  mm wide stainless steel plates with thickness in the range of 0.025–2  mm. Bubbles are induced on the samples by 1064-nm laser pulses with pulse durations of 7–60  ns and pulse energies of 10–55  mJ. We observe formation of a fixed-type secondary cavity behind the edge where low-pressure area develops due to bubble-driven flow of the liquid. This occurs when the velocity of liquid overflow exceeds ~20  m s−1. A re-entrant liquid injection with up to ~40  m s−1 velocity may occur inside the bubble when the bubble overflows the edge of the sample. Formation and characteristics of the jet evidently depend on the relation between the breakdown-edge offset and the bubble energy, as well as the properties of the surrounding liquid. Higher viscosity of the liquid prevents the generation of the jet.
topic Laser ablation in liquids
Cavitation bubble
Illumination
Shadowgraphy
Nanoparticle production
Re-entrant jet
url http://www.sciencedirect.com/science/article/pii/S1350417721000018
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