Search results for "Gas bubble"

showing 4 items of 4 documents

Periodic volcanic degassing behavior: The Mount Etna example

2013

[1] In contrast to the seismic and infrasonic energy released from quiescent and erupting volcanoes, which have long been known to manifest episodes of highly periodic behavior, the spectral properties of volcanic gas flux time series remain poorly constrained, due to a previous lack of hightemporal resolution gas-sensing techniques. Here we report on SO2 flux measurements, performed on Mount Etna with a novel UV imaging technique of unprecedented sampling frequency (0.5Hz), which reveal, for the first time, a rapid periodic structure in degassing from this target. These gas flux modulations have considerable temporal variability in their characteristics and involve two period bands: 40–250…

Gas bubble010504 meteorology & atmospheric sciencesPeriod (periodic table)Mount Etna; periodic gas flux; UV camera; volcanic tremor; Geophysics; Earth and Planetary Sciences (all)InfrasoundFluxUV camera010502 geochemistry & geophysics01 natural sciences0105 earth and related environmental sciencesgeographygeography.geographical_feature_categorySpectral propertiesGeophysicsvolcanic tremorMountMount Etna; periodic gas flux; UV camera; volcanic tremor; Earth and Planetary Sciences (all); GeophysicsGeophysicsVolcano13. Climate actionGeneral Earth and Planetary SciencesMount EtnaImaging techniqueperiodic gas fluxMount Etna; periodic gas flux; UV camera; volcanic tremorEarth and Planetary Sciences (all)GeologySeismology
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Three-circle method in the investigations of shapes of gas bubble clusters in two-phase flow

1991

We present an attempt of formulating a quantitative criterion for division into homogeneous and heterogeneous flow patterns basing on the probabilistic analysis of gas bubble distribution in the liquid

Gas bubbleChemistryApplied MathematicsGeneral Chemical EngineeringBubbleThermodynamicsGeneral ChemistryMechanicsDivision (mathematics)Flow patternIndustrial and Manufacturing EngineeringPhysics::Fluid DynamicsDistribution (mathematics)HomogeneousProbabilistic analysis of algorithmsTwo-phase flowChemical Engineering Science
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Shapes of a gas bubble rising in the vertical Hele–Shaw cell with magnetic liquid

2005

Abstract Dynamics of the bubble rising in the vertical Hele–Shaw cell with magnetic liquid in the normal magnetic field is studied. Linear stability analysis of the circular shape is carried out. Development of the instability with respect to the lowest symmetric mode is simulated by the boundary integral equation technique.

PhysicsGas bubbleBubbleMechanicsCondensed Matter PhysicsInstabilityIntegral equationElectronic Optical and Magnetic MaterialsMagnetic fieldCondensed Matter::Soft Condensed MatterPhysics::Fluid DynamicsBoundary integral equationsClassical mechanicsHele-Shaw flowLinear stabilityJournal of Magnetism and Magnetic Materials
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Analysis of joining and division of gas bubbles based on measurements of their motion trajectories

2014

The paper presents considerations on motion of a group of air bubbles. Special attention has been paid to interactions between them. The author presents the test stand structure and the idea of image tomograph used for measurements of bubble motion trajectories. The results of measurements have been presented in a three-dimensional space, and next characteristic behaviours of the moving bubbles were analyzed. Some basic mechanisms of the gas bubble division have been classified. DOI: http://dx.doi.org/10.5755/j01.mech.20.1.6596

Physics::Fluid DynamicsPhysicsGas bubbleOpticsbusiness.industryBubbleMotion (geometry)MechanicsDivision (mathematics)Condensed Matter PhysicsbusinessSpace (mathematics)Mechanics
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