Effect of surface tension on a liquid-jet produced by the collapse of a laser-induced bubble against a rigid boundary

Experimental investigation of the effect of ambient pressure on laser-induced bubble dynamics

“…(2.5) is not suitable for very small g, because it predicts that the value of prolongation factor k approaches infinity while the dimensionless distance parameter g approaches zero. The investigation of Godwin [18] also pointed out that the prolongation factors are in fair agreement with the theoretical predictions while g is equal to or larger than 1, but they (or collapse times) are much smaller than predicted while g is less than 1 and the values of them decreases with decreasing of g. As the previous work [8] of our group, g is in range of 0.1 in this paper. According to Godwin's work, the prolongation factor k is approximately equal to 1.14 when g is equal to 0.1 [18].…”

“…On the one hand, cavitation bubbles could be induced in different ways in experiments using adopt spark discharge [3], ultrasonics [6,7] and laser pulses [5,[8][9][10][11]. In model experiments the cavitation bubbles are generally induced by laser pulses, because the creation time and inception point of the laserinduced bubble is easy to control.…”

Dynamic study of PLGA/CS nanoparticles delivery containing drug model into phantom tissue using CO2 laser for clinical applications

“…From there onwards, as time passes by, the cavity depth and diameter increases with increasing fluence until it saturates as similarly observed in other works [14,17,[31][32][33]. The total cavity depth due to vaporization and the hydrodynamic flow resulting from the bubbles which act as a driving thermo-mechanical force can be studied in terms of laser pulse numbers.…”

“…In our first report on laser induced cavitation and the role of photoacoustic effects [14] we showed that hot, high-pressure vapor cavity produced at 2.6-3 mm can lead to energy being transported well beyond the laser beam penetration depth as a direct result of the bubble expansion following the pulse and large amplitude acoustic waves associated with bubble formation and decay. Since then many efforts have been reported on the optical cavitation dynamics [15][16][17][18][19][20] and potential use of cavitation and photoacoustic [21] as a means of delivering drug into tissue [22][23][24][25][26][27][28][29][30] and generally on a solid boundary [31][32][33]. However, for more accurate and localized delivery, controlled drug release based on nanotechnology has been one of the recent developments in this field.…”

Mass and charge transfer within a floating water bridge

“…As a matter of fact, the existence of micro-and nano bubbles has been suggested several times within the water bridge 4,5,6,7 and also in the framework of nanoscale water-based lubricating films 34 , laser-induced cavitation 35 , radio frequency treatment 36 , and biofilms 37 . Moreover, it has been reported that clouds of charged bubbles have a tendency to self-organize and form networks 37,38 .…”