in this research, the effect of bubble surface area flux, sb, and particle size on flotation rate constant, k, of pyrite (fes2) particles was studied using bubble-particle interactions. the bubble-particle collision, attachment and detachment efficiencies were calculated under different flow regimes. the k increased with increase in the collision efficiency and decrease in the detachment effici...

Abstract We investigate the two-dimensional flow of a liquid foam around circular obstacles by measuring all the local fields necessary to describe this flow: velocity, pressure, bubble deformations and rearrangements. We show how our experimental setup, a quasi-2D ”liquid pool” system, is adapted to the determination of these fields: the velocity and bubble deformations are easy to measure fro...

Previous analyses of a large ensemble of stock markets have demonstrated that a log-periodic power law (LPPL) behavior of the prices constitutes a qualifying signature of speculative bubbles that often land with a crash. We detect such a LPPL signature in the foreign capital inflow during the bubble on the US markets culminating in March 2000. We detect a weak synchronization and lag with the N...

The use of molecular and continuum emission spectra from multiple bubble (MB) and single bubble (SB) sonoluminescence (SL) is explored as a probe of bubble temperature during cavitational collapse. It is proposed that molecular and continuum SL arise from different chemical pathways, which occur during discrete intervals along the cavitational collapse time line, thus yielding different cavitat...

In this work, the rise characteristics of a single H2 bubble, in ellipsoidal regime, (i) water, (ii) electrolyte (2 M, 4.5 M NaCl) solution and (iii) various concentrations mixture (up to 6.4 1:5 weight fraction NaCl-NaClO3), have been studied, at temperatures up 80°C. Our results show that both individual collective effects temperature concentration on velocity bubble shape are purely dependen...