Effect of charge on the dynamics of an acoustically forced bubble

Hongray, Thotreithem; Ashok, B.; Balakrishnan, Janaki

doi:10.1088/0951-7715/27/6/1157

Cited by 14 publications

(38 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This can be seen in Figure (3) (left), where the minimum radius, R min , reached by the bubble at the moment of collapse is plotted as a function of the driving pressure P s and R 0 for the charged and uncharged bubble. As was shown in greater detail in our earlier work [23], R min reduces with increasing Q.…”

Section: Pressure Thresholdssupporting

confidence: 72%

“…In Figure ( (4) shows a rise of the curve till it peaks (at P s = P Blake ) followed by a trough or well (at P s = P tr ) before rising up steeply for higher P s (this has been discussed in some detail in our earlier work [23] dius R 0 , ζ loses its distinctive peak-valley appearance gradually.…”

Section: Pressure Thresholdsmentioning

confidence: 64%

“…The modified Rayleigh-Plesset equation above can be simplified and rewritten in dimensionless form [23] as…”

Section: Bubblementioning

confidence: 99%

“…Making the approximation that (h/R 0 ) 3 < 1 and also that (h/R) 3 < 1 is sufficiently small at most values of R, we can approximate Eqn. (23) by…”

Section: The Collapsing Bubble: Frequency and Charge Dependence Of mentioning

confidence: 99%

See 3 more Smart Citations

Oscillatory dynamics of a charged microbubble under ultrasound

2014

Self Cite

View full text Add to dashboard Cite

can show highly irregular oscillations which are chaotic and of unpredictable amplitude. For applications where damage caused on surfaces due to bubble cavitation can be disastrous, such as in medicine, it is desirous to operate the sonic device in a "safe" regime, and / or to be able to have control over the bubble's motion. Often in biological systems, it is known that bubbles in fluids can be electrostatically charged. Studies of the dynamics governing the oscillations, growth and collapse of charged bubbles are therefore of immense relevance because of their prevalence in diverse applications and situations. Experimental and theoretical work on the presence of charge on gas bubbles in fluids goes back to, for example, the work of McTaggart, Alty and Akulichev [9, 10, 16, 17], and more recently the work of Shiran and Watmough and Atchley [11, 12, 18]. None of the work, though, has addressed the issue of dynamics of a charged bubble under ultrasonic forcing. It is interesting to know what effect the presence of electric charge on the bubble would have and see if the motion of such a charged bubble forced by ultrasound would vary significantly from that of an electrically neutral bubble in a fluid. This especially becomes of practical significance when we are looking at cavitation phenomena in fluids in real-life, be it in the context of cavitation in mechanical systems or in the case of bubbles in fluids in living tissue in a medical context. Apart from the work in [15], we are not aware of any other studies in the literature of the dynamics of acoustically forced charged bubbles suspended in a fluid. Their work however used the value 4/3 for the polytropic constant which entailed cancellation of all the charged terms; thus their work does not really address the issue of charge which it sets out to do. The extremely nonlinear nature

show abstract

Section: Pressure Thresholdssupporting

confidence: 72%

Section: Pressure Thresholdsmentioning

confidence: 64%

“…The modified Rayleigh-Plesset equation above can be simplified and rewritten in dimensionless form [23] as…”

Section: Bubblementioning

confidence: 99%

“…Making the approximation that (h/R 0 ) 3 < 1 and also that (h/R) 3 < 1 is sufficiently small at most values of R, we can approximate Eqn. (23) by…”

Section: The Collapsing Bubble: Frequency and Charge Dependence Of mentioning

confidence: 99%

See 2 more Smart Citations

Oscillatory dynamics of a charged microbubble under ultrasound

2014

Self Cite

View full text Add to dashboard Cite

show abstract

“…The work of Alty and others [8][9][10][11] were some of the first to discuss the presence of charge on gas bubbles in fluids. Forced oscillations of a charged bubble under ultrasonic forcing, on the other hand, were not discussed at any great detail in the literature until our recent work [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

The charged bubble oscillator: Dynamics and thresholds

Ashok¹,

Hongray²,

Balakrishnan³

2017

IASCS

Self Cite

View full text Add to dashboard Cite

The nonlinear, forced oscillations of a bubble in a fluid due to an external pressure field are studied theoretically. In the presence of a constant charge on the bubble, the bubble oscillator's behaviour changes markedly. We report results at significantly higher pressures and forcing frequencies than presented earlier. The influence of the bubble's ambient radius on thresholds and dynamics is also reported. Charge and pressure thresholds are calculated for the system, delineating different dynamics.

show abstract

Dynamics and Kinematics at Small Scales: From Micro and Nano Bubbles to Nanotubulation

Ashok

2018

Unifying Themes in Complex Systems IX

View full text Add to dashboard Cite

Effect of charge on the dynamics of an acoustically forced bubble

Cited by 14 publications

References 49 publications

Oscillatory dynamics of a charged microbubble under ultrasound

Oscillatory dynamics of a charged microbubble under ultrasound

The charged bubble oscillator: Dynamics and thresholds

Dynamics and Kinematics at Small Scales: From Micro and Nano Bubbles to Nanotubulation

Contact Info

Product

Resources

About