Cavitation phenomena in pulse modulated ultrasound fields

Ciuti, P.; Дежкунов, Н. В.; Iernetti, G.; Кулак, А. И.

doi:10.1016/s0041-624x(97)00114-5

Cited by 17 publications

(11 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ultrasonic cavitation as a nonliner acoustic phenomenon was the production of cavities inside a liquid irradiated by ultrasound as a result of the presence of microbubbles in the liquid filled with the liquid vapor. These microbubbles left the liquid field and were in some way able to concentrate the acoustic energy into a small volume and give rise to visible effects 14–16…”

Section: Resultsmentioning

confidence: 99%

Effect of ultrasound on wettability between aramid fibers and epoxy resin

Liu

Huang

Zhang

et al. 2005

J of Applied Polymer Sci

View full text Add to dashboard Cite

Good wetting of reinforced fiber by resin was a main factor in the improvement of the interface adhesion of their composites. Ultrasound with a frequency of 20 kHz was used to improve the wettability between aramid fibers and epoxy resin during the winding process of the composites. The effects of ultrasound on the viscosity and surface tension of epoxy resin and on the surface characteristics of aramid fibers were investigated. The wettability of aramid fibers and treated epoxy resin under different conditions and of aramid fibers and epoxy resin under ultrasonic online treatment were compared. The results indicated that the main action of ultrasound was to force epoxy resin to impregnate aramid fibers, in addition to the influence of ultrasound on the properties of epoxy resin and aramid fibers. The results of microdebond testing showed that the interfacial shear strength (IFSS) of aramid/epoxy composites could be 26% higher than that of untreated composites because of the improved wettability between aramid fibers and epoxy resin subjected to ultrasonic online treatment.

show abstract

Section: Resultsmentioning

confidence: 99%

Effect of ultrasound on wettability between aramid fibers and epoxy resin

Liu

Huang

Zhang

et al. 2005

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…In pressure anti-nodes, the mechanical equilibrium radius of these bubbles is contained in the [0. [3][4][5][6][7][8][9] lm range [28]. The presence of bubbles with radii greater than the linear resonance radius R r [29], about 3 lm, is uncertain.…”

Section: The B Regimementioning

confidence: 99%

“…The chopped ultrasonic irradiation mode (or pulsed mode if wave emissions are short) modifies both the cavitation thresholds [1][2][3][4] and the intensity of the cavitation effects [5][6][7][8][9][10] according to the chopping characteristics.…”

Section: Introductionmentioning

confidence: 99%

Evolution of an 1 MHz ultrasonic cavitation bubble field in a chopped irradiation mode

Labouret¹,

Frohly²,

Rivart³

2006

Ultrasonics Sonochemistry

View full text Add to dashboard Cite

In this paper the evolution of an ultrasonic cavitation bubble field is studied by means of the void rate, the cavitation noise power and the electric power that feeds the ultrasonic transducer. The ultrasonic irradiation is performed in chopped mode. It is observed two kinds of evolution that differ respectively by a slow (A regime) and a fast (B regime) void rate increase. They correspond to cavitation regimes that are identified as respectively a stable cavitation and an inertial cavitation field. The beginning of the fast increase of the void rate is delayed from the irradiation start and this delay depends on the chopping frequency of the irradiation mode.

show abstract

“…For additional confirmation of a specific alteration of cavitation activity in Mg aqueous suspensions, the ultrasonic treatment of the suspension is performed using pulsed regime. This regime allows controlling the dynamics of cavitation activity [33] , [39] . First of all, we noted that in a pulsed field the level of cavitation activity achieved was significantly lower than in a continuous one.…”

Section: Resultsmentioning

confidence: 99%