Electron beam polarization in the bubble regime of interaction between a high-intensity laser and longitudinally pre-polarized plasma is investigated by means Thomas-Bargmann-Michel-Telegdi equation. Using test-particle model, dependence accelerated electron on geometry analyzed detail. Tracking dynamics individual electrons reveals that although spin direction changes during both self-injectio...

Bubble columns are multiphase equipments used to bring into contact gas and liquid phases. Gas, that constitutes the dispersed phase, is distributed at the bottom of the column and rises as bubbles through the liquid that constitutes the continuous phase. They are frequently used in the industry although the partial knowledge of the fluid dynamics of the gas-liquid flow have hindered a complete...

We present an analytical study on the effects of transverse plasma gradient in blowout regime a wakefield accelerator. The analysis departs from simple ballistic model electrons and allows us to derive complete analytic solution for pseudopotential and, consequently, wakefield. demonstrate that modifies bubble shape affects wakefield; namely, dipole results component Analysis suggests that, des...

The radial dynamics of a single sonoluminescing bubble has been investigated in surfactant solutions. Experimental results show that an increase in the surfactant concentration leads to a decline in the oscillation amplitude and hence light emission intensity. Numerical simulations support this result, showing that under the driving pressures required to achieve single bubble sonoluminescence (...

We present results from magneto-hydrodynamic jet simulations in the magnetically dominated regime and find that they inflate cavities into the intracluster medium. Mock Chandra X-ray observations of our simulations show a strong resemblance to real cavities observed in X-ray images of clusters, both in terms of their morphology and thermodynamic structure. An analysis of the evolution of bubble...

Unique experiments were performed in a homogeneously sparged rectangular 400×200×2630 mm (W×D×H) bubble column with and without liquid co-flow. Bubbles the range 4–7 produced by needle spargers, which resulted very uniform size. Dual-tip optical fibre probes used to measure horizontal profiles of gas fractions, velocities chord lengths for superficial Usg 0.63–6.25 cm/s Usl up 20 cm/s. Images c...

We report on an experimental study of the onset of surface oscillation and jetting of bubbles attached to a rigid surface. The driving frequency is 16.27 kHz and the radius of the spherical capped bubble is 160 ± 5 μm. The acoustic amplitude is increased from 0 to 0.085 bar while the oscillation is recorded with a high-speed camera at 180,000 frames/s over 8100 periods of oscillations. The radi...

Relativistically invariant self-similarity approach is applied for description of collective particle production by femtosecond laser pulses. Recent outstanding advances in laser technique, namely, generation of ultrashort laser pulses ensuring intensities on the target of an order of 10 W/cm opened a wide class of new phenomena of production of intense and "highly-coherent" beams of radiations...

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 decreas...