0000000000222508

AUTHOR

Pavel Trtik

showing 4 related works from this author

Argon bubble flow in liquid gallium in external magnetic field

2020

ArgonMaterials sciencechemistryMechanics of MaterialsMechanical EngineeringBubble flowchemistry.chemical_elementElectrical and Electronic EngineeringLiquid galliumAtomic physicsCondensed Matter PhysicsElectronic Optical and Magnetic MaterialsMagnetic fieldInternational Journal of Applied Electromagnetics and Mechanics
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Resolving gas bubbles ascending in liquid metal from low-SNR neutron radiography images

2021

We demonstrate a new image processing methodology for resolving gas bubbles travelling through liquid metal from dynamic neutron radiography images with an intrinsically low signal-to-noise ratio. Image pre-processing, denoising and bubble segmentation are described in detail, with practical recommendations. Experimental validation is presented—stationary and moving reference bodies with neutron-transparent cavities are radiographed with imaging conditions representative of the cases with bubbles in liquid metal. The new methods are applied to our experimental data from previous and recent imaging campaigns, and the performance of the methods proposed in this paper is compared against our p…

FOS: Computer and information sciencesLiquid metalTechnologyMaterials scienceQH301-705.5low signal-to-noise ratio (SNR)BubbleAcousticsNoise reductionQC1-999Computer Vision and Pattern Recognition (cs.CV)dynamic neutron imagingComputer Science - Computer Vision and Pattern Recognitionmetohydrodynamics (MHD)FOS: Physical sciencesImage processingdenoisingGeneral Materials ScienceSegmentationBiology (General)InstrumentationQD1-999Fluid Flow and Transfer ProcessesProcess Chemistry and TechnologyNeutron imagingTPhysicssegmentationGeneral EngineeringFluid Dynamics (physics.flu-dyn)Experimental dataPhysics - Fluid DynamicsEngineering (General). Civil engineering (General)Computer Science Applicationsimage processingtwo-phase flowChemistryliquid metalComputer Science::Computer Vision and Pattern RecognitionTwo-phase flowTA1-2040bubble flow
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Phase boundary dynamics of bubble flow in a thick liquid metal layer under an applied magnetic field

2020

Dynamic neutron radiography is used to observe the effect of a transverse magnetic field on argon bubbles rising through a thick layer of liquid gallium without interactions with the container walls.

Fluid Flow and Transfer ProcessesLiquid metalPhase boundaryMaterials scienceArgonCondensed matter physicsPhysics::Instrumentation and DetectorsNeutron imagingDynamics (mechanics)Computational Mechanicschemistry.chemical_elementMagnetic fieldPhysics::Fluid DynamicschemistryModeling and SimulationBubble flowNuclear ExperimentLayer (electronics)Physical Review Fluids
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Dynamic neutron imaging of argon bubble flow in liquid gallium in external magnetic field

2020

This paper presents detailed results of neutron imaging of argon bubble flows in a rectangular liquid gallium vessel with and without the application of external horizontal magnetic field. The developed image processing algorithm is presented and its capability to extract physical information from images of low signal-to-noise ratio is demonstrated. Bubble parameters, velocity components, trajectories and relevant statistics were computed and analysed. A simpler version of the code was applied to the output of computational fluid dynamics simulations that reproduced the experiment. This work serves to further validate the neutron radiography as a suitable method for monitoring gas bubble fl…

Physics::Fluid DynamicsImage and Video Processing (eess.IV)FOS: Electrical engineering electronic engineering information engineeringElectrical Engineering and Systems Science - Image and Video Processing
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