Particle Removal in Ultrasonic Water Flow Cleaning Role of Cavitation Bubbles as Cleaning Agents

Ando, Keita; Sugawara, M; Sakota, Riria

doi:10.4028/www.scientific.net/ssp.314.218

Cited by 11 publications

(7 citation statements)

References 7 publications

(7 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similarly, when bubbles are larger than the resonance size, they move from the acoustic antinode to the acoustic node [6] , resulting in a standing wave-like acoustic field inside the acrylic bath. Similar observations were made by Ando and co-authors [37] , [38] . To gain insight into the coalescence and agglomeration behavior of bubbles, we recorded the input power and corresponding output power while bubbles were streaming in the ultrasonic standing wave field.…”

Section: Methodssupporting

confidence: 89%

Chemically controlled megasonic cleaning of patterned structures using solutions with dissolved gas and surfactant

Sahoo

Han

Kim

et al. 2022

Ultrasonics Sonochemistry

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Methodssupporting

confidence: 89%

Chemically controlled megasonic cleaning of patterned structures using solutions with dissolved gas and surfactant

Sahoo

Han

Kim

et al. 2022

Ultrasonics Sonochemistry

Self Cite

View full text Add to dashboard Cite

show abstract

“…The broad range of bubble dynamics allows for a wide field of useful applications, such as surface cleaning (Ohl et al 2006a;Kim et al 2009;Gonzalez-Avila et al 2011a;Reuter et al 2017;Ando et al 2021Ando et al , 2023 or drug delivery via sonoporation (Prentice et al 2005;Ohl et al 2006b;Gac et al 2007). For these applications, large wall shear stresses are beneficial, especially if they can be generated without exposing the wall to an excessively large pressure that may cause damage to even the hardest materials (Tomita & Shima 1986;Philipp & Lauterborn 1998;Reuter et al 2022a).…”

Section: Introductionmentioning

confidence: 99%

Single cavitation bubble dynamics in a stagnation flow

Mnich,

Reuter,

Denner

et al. 2024

J. Fluid Mech.

View full text Add to dashboard Cite

Jetting of collapsing bubbles is a key aspect in cavitation-driven fluid–solid interactions as it shapes the bubble dynamics and additionally due to its direct interaction with the wall. We study experimentally and numerically the near-wall collapse and jetting of a single bubble seeded into the stagnation flow of a wall jet, i.e. a jet that impinges perpendicular onto a solid wall. High-speed imaging shows rich and rather distinct bubble dynamics for different wall jet flow velocities and bubble-to-wall stand-off distances. The simulations use a volume-of-fluid method that allows us to numerically determine the microscopic and transient pressures and shear stresses on the wall. It is shown that a wall jet at moderate flow velocities of a few metres per second already shapes the bubble ellipsoidally inducing a planar and convergent jet flow. The distinct bubble dynamics allow us to tailor the wall interaction. In particular, the shear stresses can be increased by orders of magnitude without increasing impact pressures the same way. Interestingly, at small seeding stand-offs, the bubble during the final collapse stage can lift off the wall and migrate against the flow direction of the wall jet such that the violent collapse occurs away from the wall.

show abstract

“…Under such extreme conditions, cavitation in water leads to the formation of hydroxyl radicals, which have a very high reaction rate, making them very powerful oxidizing agents [9]. The wide variability of bubble dynamics allows them to be used in a wide range of useful applications, such as surface cleaning [11][12][13]. Cavitation can also be initiated for other tasks, such as emulsification, sonophoresis, and homogenization [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Numerical Modeling of the Behavior of Bubble Clusters in Cavitation Processes

Pavlenko

2024

Energies

View full text Add to dashboard Cite

To study the behavior of a bubble clusters in cavitation devices, a numerical study of the dynamics of bubbles in a compressible liquid was performed, taking into account interfacial heat and mass transfer. The influence of regime and system parameters on the intensity of cavitation processes is considered. Physical and chemical transformations during the cavitation treatment of liquids are caused not only by the action of shock waves and emitted pressure pulses but also by extreme thermal effects. At the stage of extreme compression of the bubble, the vapor inside the bubble and the liquid in its vicinity transform into the state of a supercritical fluid. The presented model analyzes the nature of microflows in the interbubble space and carries out a quantitative calculation of the local values of the parameters of the velocity and pressure fields.

show abstract

Particle Removal in Ultrasonic Water Flow Cleaning Role of Cavitation Bubbles as Cleaning Agents

Cited by 11 publications

References 7 publications

Chemically controlled megasonic cleaning of patterned structures using solutions with dissolved gas and surfactant

Chemically controlled megasonic cleaning of patterned structures using solutions with dissolved gas and surfactant

Single cavitation bubble dynamics in a stagnation flow

Numerical Modeling of the Behavior of Bubble Clusters in Cavitation Processes

Contact Info

Product

Resources

About