Determination of the Secondary Bjerknes Force in Acoustic Resonators on Ground and in Microgravity Conditions

Castro, Luz Angelica; Hoyos, Mauricio

doi:10.1007/s12217-015-9463-8

Cited by 14 publications

(5 citation statements)

References 7 publications

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“…A higher density of cavitation bubbles means that the distance between individual cavitation bubbles ( d ) in the antinodes will be shorter as well. The secondary Bjerknes force (

) responsible for bubble coalescence is therefore expected to be higher at lower reactor volumes as shown through the following expression for the secondary Bjerknes force [23] , [24] , [9] .

…”

Section: Discussionmentioning

confidence: 99%

Towards scaling up the sonochemical synthesis of Pt-nanocatalysts

Hansen,

Berge,

Seland

et al. 2024

Ultrasonics Sonochemistry

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“…A higher density of cavitation bubbles means that the distance between individual cavitation bubbles ( d ) in the antinodes will be shorter as well. The secondary Bjerknes force (

) responsible for bubble coalescence is therefore expected to be higher at lower reactor volumes as shown through the following expression for the secondary Bjerknes force [23] , [24] , [9] .

…”

Section: Discussionmentioning

confidence: 99%

Towards scaling up the sonochemical synthesis of Pt-nanocatalysts

Hansen,

Berge,

Seland

et al. 2024

Ultrasonics Sonochemistry

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“…Similar dynamic models have been reported in ref. 9, 40 and 82 for the calculation of interaction forces. The balance of forces between the acoustic radiation force and drag is common to all of these models.…”

Section: Experimental Measurementsmentioning

confidence: 99%

Acoustofluidics 24: theory and experimental measurements of acoustic interaction force

et al. 2022

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“…With a Soret effect of non-colloidal species, particles migrate from higher to lower temperatures, in qualitative agreement with our observations. Once particles are far apart from each other, with distances longer than the Bjerknes acoustic forces range 26,27 , the aggregate starts to disrupt. Unfortunately, thorough investigations would be needed to precisely quantify the thermal gradient generated in the boundary layer surrounding the particles in levitation and illuminated with the proper wavelength.…”

Section: Heating Of the Fluid Itselfmentioning

confidence: 99%

Observation of selective optical manipulation of particles in acoustic levitation

Dumy

Hoyos

Aider

2019

The Journal of the Acoustical Society of America

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Acoustic Radiation Force is commonly used to create stable large-scale aggregates of particles in levitation (so-called “acoustic levitation”) in a micro-cavity. The authors show in the following work that this well-known and well-controlled aggregation process can be reversed without contact or external flow if the aggregated particles are enlightened with the proper optical wavelength. This coupled optics and acoustics effect has been observed with various kinds of particles and different optic wavelengths, showing high reproducibility. The phenomenon is studied using fluorescent micro-metric polystyrene particles without flow, and the effects of acoustic energy and illumination power have been quantitatively assessed. It is then exploited to separate a mix of particles with identical mechanical properties based on their different optic absorption. If the phenomenon is not well understood, some possible mechanisms are proposed and discussed that could be responsible for the rapid ejection of the objects in levitation from the illuminated area. Since it is a tag free phenomenon that does not need high energies to happen and since it works with biological objects such as algae, red blood cells, and bacteria, it may open the way to a broad range of applications.

show abstract

Determination of the Secondary Bjerknes Force in Acoustic Resonators on Ground and in Microgravity Conditions

Cited by 14 publications

References 7 publications

Towards scaling up the sonochemical synthesis of Pt-nanocatalysts

Towards scaling up the sonochemical synthesis of Pt-nanocatalysts

Acoustofluidics 24: theory and experimental measurements of acoustic interaction force

Observation of selective optical manipulation of particles in acoustic levitation

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