Acoustic cavitation is an effective means of concentrating energy and can be used to drive a variety of chemical reactions. By changing the experimental parameters that control conditions during bubble collapse, different chemical environments can be created. The sonochemical reactions associated with metal carbonyls in alkane solvents are quite diverse and illustrate this phenomena. For exampl...

Cavitation bubbles generated via laser-induced breakdown are investigated experimentally. The present work focuses on the direction of first bubble collapse near a solid surface in distilled water. is placed to right side cuvette filled with water and then top cuvette. In this experiment, it observed which cavitation collapses. visualized by high-speed camera frequency 68kHz.

Abstract This paper, aiming at the water-exit process of vehicle with cavitation, based on moving domain method coupled SDOF (six degrees freedom) solver, using VOF (volume fluid) multiphase model and Schnerr-Sauer cavitation model, carrying out numerical simulation research multi-conditions. Comparing vertical launch vehicles different Ca (cavitation number) cases, sudden decrease in number is...

The influence of a continuous sound field on the first oscillation cycle and on the cavitation luminescence of a transient laser-induced bubble is investigated experimentally. The variation of the collapse phase is predicted with a simple numerical model and compared with experiment. Bubble dynamics is mainly influenced by three parameters: the phase of bubble generation, the size of the bubble...

This paper presents experimental data and numerical simulations of transient vaporous cavitation events generated by a downstream fast valve closure in a pipeline. The experimental apparatus comprises a 37.2 m long constant-sloping pipe of 22.1 mm internal diameter connecting two pressurized tanks. The simulation results show that improper selection of the weighting function in the convolution-...

The synergism between low-frequency sonophoresis (LFS) and chemical penetration enhancers (CPEs), especially surfactants, in transdermal enhancement has been investigated extensively since this phenomenon was first observed over a decade ago. In spite of the identifying that the origin of this synergism is the increased penetration and subsequent dispersion of CPEs in the skin in response to LF...

We consider a pressure (density) in a square flume solid boundaries and no-slip format condition formulation are introduced to investigate cavitation bubble for the two-dimensional lattice Boltzmann method (LBM). Using the coupling Carnahan-Starling equation of state (C-S EOS) and exact difference method (EDM) based on modified Shan-Chen model, the whole process of bubble collapse was observed ...