Hydrogen can be produced via methane pyrolysis in a molten metal bubble column to create separable carbon. Tin is used as base this study, and catalytically active metals such nickel copper are added it. The study uses differential equation that takes into account both parallel catalytic surface reactions on the conventional noncatalytic gas bulk. research analyzes effect of type, temperature, ...

Flow boiling of HFE 7000 in five parallel microchannels of 222 m hydraulic diameter, each containing a single row of 24 in-line 100 m pin fins, was investigated. High speed photography revealed the dominant flow patterns, namely, the bubbly flow, the multiple flow, and the wavy-annular flow. The interaction of the bubble with the pin fins during nucleate boiling from G 350 kg /m2 s to G 827 kg ...

We briefly review the significance of quantum corrections in the total energy of systems with voids: bubble nuclei, atomic clusters and the inhomogeneous phase of neutron stars. It was suggested a long time ago that very large nuclei might not undergo a Coulomb explosion if they acquire a new topology, that of a bubble or a torus 1. When a void is formed, while the density and therefore the tot...

To the Editor:—I read with considerable interest the article by Benavides et al. describing experiments of air bubble growth in water during exposure to 100% nitrous oxide, 100% xenon, or 50% xenon–50% oxygen. Although the experiments were nicely conducted, they explore a physics of gas flux in an unconstrained bubble permitted to grow spherically. Importantly, this geometry has limited biologi...

New data are reported from the operation of a 4.0 kg CF3I bubble chamber in the 6800 foot deep SNOLAB underground laboratory. The effectiveness of ultrasound analysis in discriminating alpha decay background events from single nuclear recoils has been confirmed, with a lower bound of >99.3% rejection of alpha decay events. Twenty single nuclear recoil event candidates and three multiple bubble ...

The effect of initial bubble diameter on the motion pattern in a flotation column has been studied by twophase computational fluid dynamics (CFD) method. two-phase simulations have done using volume (VOF) model ANSYS® Fluent® software. field was square cross-section with width 0.1 m and height 1 into which air interred as single from lower part an internal sparger. An experimental test also per...

Hybrid particles are of great significance in terms of their adjustable optical, electronic, magnetic, thermal and mechanical properties. As a novel technique, laser ablation in liquids (LAL) is famous for its precursor-free, "clean" synthesis of hybrid particles with various materials. Till now, almost all the LAL-generated particles originate from the nucleation-growth mechanism. Seed-growth ...

Bubble nucleation phenomenon in presence of gas impurities is studied by microcanonical molecular dynamics simulation for Lennard-Jones fluid. First, we investigate effect of molecular diameter of dissolved gas on the nucleation rate with pressure change. As a result, we find increase of the nucleation rate with increase of the pressure, which we call "inverse" pressure phenomenon, when interac...

In the movement process of continuous bubbles, different liquid-flow state and initial temperature bubbles have important influence on bubble heat transfer. this study, flow transfer characteristics high in normal liquid are investigated. The rising studied by numerical simulation compared with experimental results for verification. show that shape, velocity affected position bubble. Because cl...