An Attempt to Produce Electrical Discharges in Acoustic Cavitation Bubbles

On acoustic cavitation of slightly subcritical bubbles

The classical Blake threshold indicates the onset of quasistatic evolution leading to cavitation for gas bubbles in liquids. When the mean pressure in the liquid is reduced to a value below the vapor pressure, the Blake analysis identifies a critical radius which separates quasistatically stable bubbles from those which would cavitate. In this work, we analyze the cavitation threshold for radia...

The acoustic emissions of cavitation bubbles in stretched vortices.

Pairs of unequal strength, counter-rotating vortices were produced in order to examine the inception, dynamics, and acoustic emission of cavitation bubbles in rapidly stretching vortices. The acoustic signatures of these cavitation bubbles were characterized during their inception, growth, and collapse. Growing and collapsing bubbles often produced a sharp, broadband, pop sound. The spectrum of...

Luminescence from acoustic-driven laser-induced cavitation bubbles

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...

An attempt to produce hypersplenism in the dog, using methylcellulose.

By S. NI. \VEISSMAN, T. A. \\‘ALDMANN, E. LEvIN, AND N. I. BERLIN I HE ROLE of the spleen in the control of production and destruction of erythrocytes in “hypersplenic” disease states is not well understood. The lack of a satisfactory experimental model in a large animal has handicapped laboratory investigations of hyperspienism. Effors to produce the syndrome by ligation of the spbenic vein or...

Correspondence: An attempt to produce immune complexes in experimental syphilis.