izpis_h1_title_alt

Dynamics of laser-induced cavitation bubble during expansion over sharp-edge geometry submerged in liquid – an inside view by diffuse illumination
ID Senegačnik, Matej (Avtor), ID Kunimoto, Kohei (Avtor), ID Yamaguchi, Satoshi (Avtor), ID Kimura, Koki (Avtor), ID Sakka, Tetsuo (Avtor), ID Gregorčič, Peter (Avtor)

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Izvleček
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.

Jezik:Angleški jezik
Ključne besede:laser ablation in liquids, cavitation, bubble shadowgraphy, cavitation bubble, illumination, shadowgraphy, nanoparticle production, re-entrant jet
Vrsta gradiva:Članek v reviji (dk_c)
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FS - Fakulteta za strojništvo
Leto izida:2021
Status objave pri reviji:Objavljeno
Verzija članka:Založnikova različica članka
Št. strani:16 str.
Številčenje:Vol. 73, art. 105460
PID:20.500.12556/RUL-125585 Povezava se odpre v novem oknu
UDK:532.528:681.7.069.24(045)
ISSN pri članku:1350-4177
DOI:10.1016/j.ultsonch.2021.105460 Povezava se odpre v novem oknu
COBISS.SI-ID:46704131 Povezava se odpre v novem oknu
Datum objave v RUL:26.03.2021
Število ogledov:312
Število prenosov:170
Metapodatki:XML RDF-CHPDL DC-XML DC-RDF
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Gradivo je del revije

Naslov:Ultrasonics sonochemistry
Skrajšan naslov:Ultrason. sonochem.
Založnik:Elsevier
ISSN:1350-4177
COBISS.SI-ID:707668 Povezava se odpre v novem oknu

Licence

Licenca:CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
Povezava:http://creativecommons.org/licenses/by/4.0/deed.sl
Opis:To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

Jezik:Slovenski jezik
Ključne besede:laserska ablacija v kapljevinah, kavitacijski mehurček, senčna fotografija, osvetlitev, proizvodnja nanodelcev, vstopni curek

Projekti

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Številka projekta:J2-1741
Naslov:Lasersko mikro- in nanostrukturiranje za razvoj biomimetičnih kovinskih površin z edinstvenimi lastnostmi (LaMiNaS)

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Številka projekta:BI-JP/18-20-004

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Številka projekta:P2-0392
Naslov:Optodinamika

Financer:Drugi - Drug financer ali več financerjev
Program financ.:JSPS, Japan-Slovenia Research Cooperative Program

Financer:Drugi - Drug financer ali več financerjev
Program financ.:JSPS
Številka projekta:JP20H02764
Akronim:KAKENHI

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