Cavitation Produced by Ultrasonics: Theoretical Conditions for the Onset of Cavitation

Sonoluminescence as the PeTa Radiation

“…At the period of the study of CL and SL until now, the main efforts have been focused on explaining these phenomena in terms of emission of high temperature plasma. For instance, in accordance with theoretical papers [12] [13], during SL implosion of bubbles their contents may be adiabatically heated to temperatures between 5000 -10,000 K. The cavitation is not only restricted to a finite range of frequen-cies ω and vapor nuclei of sizes R 0 but also to a fixed range of hydrostatic pressure P A and alternating pressure amplitude P 0 . This SL should vary in the same way as the intensity of cavitation and should decrease with ω.…”

A reduced model of cavitation physics for use in sonochemistry

“…A major simpli cation we employ to develop a model of reduced complexity is to treat the gas as either isothermal or adiabatic. Similar approaches to the heat-transfer problem have been taken before (see, for example, Noltingk & Neppiras 1950;Neppiras & Noltingk 1951). The adiabatic/isothermal behaviour determines how to compute the pressure in the gas mixture, to which we turn our attention in x 2 f .…”

Ultrasound contrast agents : dynamics of coated bubbles

“…2. 16. Note that all assumptions made previously for the Rayleigh-Plesset equation for an uncoated microbubble remain valid.…”

“…The dynamics of an uncoated bubble in free space was first described by Lord Rayleigh [13] and was later refined by Plesset [14], Noltingk & Neppiras [15,16] and Poritsky [17] to account for surface tension and viscosity of the liquid. A popular version of the equation of motion describing the bubble dynamics (often referred to as the Rayleigh-Plesset equation ) is given by:…”