In addition to the vapour of the liquid, bubbles in cavitating flows usually contain also a certain amount of permanent gas that diffuses out of the liquid as they grow. This paper presents a simplified linear model for the propagation of monochromatic pressure waves in a bubbly liquid with these characteristics. Phase change effects are included in detail, while the gas is assumed to follow a ...

Cavitation is in most cases harmful and undesired phenomenon in fluid power systems. When actions for preventing cavitation are considered, it is essential to recognise the existence of cavitation and location of cavitation inception point. In fluid power components and systems cavitation can occur in various locations where the access for measuring instruments is limited. Therefore, the existe...

0167-9317/$ see front matter 2011 Elsevier B.V. A doi:10.1016/j.mee.2011.11.013 ⇑ Corresponding author. E-mail address: [email protected] (S. Raghavan) The application of megasonic energy in semiconductor cleaning solutions has been shown to be very effective in improving the particle removal efficiency (PRE). There has been a significant interest in understanding the phenomena of cavitation ...

This study investigated the effects of seawater on cavitation noise using a water jet test, a two-dimensional wing test, and a three-dimensional wing test. A model propeller cavitation test was conducted in a cavitation tunnel using seawater, in order to determine the effects of propeller cavitation more precisely. In the cavitation tests, measured propeller performance for both cavitation nois...

Cavitation greatly affects the safe and stable operation of hydraulic machineries thus has been key challenge in this field. Cavity collapse caused by cavitation can form transient characteristics such as high temperature, pressure, strong shock wave, high-speed micro-jet, which may cause serious damage to nearby solids. be affected many intercoupled factors during transition. However, existing...

This study presents an examination on the correlation of sonication operating condition, sludge property, formation and behaviour of cavitation bubbles in sludge disruption under low-frequency ultrasound sonication. The influence of sonication time, sonication density, type of sludge and solids content on the disruption was evaluated. The most vigorous particle disruption was achieved in the in...

Rao, Navalgund, "Frequency modulated pulse for ultrasonic imaging in an attenuating medium" (1990). IEEE,Accessed from ABSTRACT There is now increasing theoretical and experimental evidence that ultrasound used at intensities employed clinically, can produce effects characteristic of transient cavitation. Probability to cause bioeffects by transient cavitation is immensely greater above a thres...

The nonlinear dynamics of a spherical cloud of cavitation bubbles have been simulated numerically in order to learn more about the physical phenomena occurring in cloud cavitation. A finite cloud of nuclei is subject to a decrease in the ambient pressure which causes the cloud to cavitate. A subsequent pressure recovery then causes the cloud to collapse. This is typical of the transient behavio...

Plasmonic photothermal therapy (PPTT) using plasmonic nanoparticles as efficient photoabsorbing agents has been proposed previously. One critical step in PPTT is to effectively deliver gold nanoparticles into the cells. This study demonstrates that the delivery of gold nanorods (AuNRs) can be greatly enhanced by combining the following three mechanisms: AuNRs encapsulated in protein-shell micro...