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Impact of particle boundary conditions on the collision rates of inclusions around a single bubble rising in liquid metal
Author(s) -
May Ronja,
Gruy Frédéric,
Fröhlich Jochen
Publication year - 2018
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201800029
Subject(s) - bubble , mechanics , inertia , collision , materials science , slip (aerodynamics) , aluminium , particle (ecology) , argon , boundary value problem , liquid metal , classical mechanics , physics , composite material , thermodynamics , atomic physics , geology , oceanography , computer security , quantum mechanics , computer science
In the presented flow simulations a spherical argon gas bubble rises in stagnant liquid metal with initially homogeneously distributed spherical aluminium oxide particles of small inertia. Depending on their relative position to the bubble particles are subjected to different fluid forces and show different collision behaviour. The contribution presents Direct Numerical Simulations with the bubble being geometrically resolved and the inclusions represented as point particles. In the community, the boundary condition at the particle surface is discussed controversially. To elucidate its potential influence, two extreme cases are simulated, one with full no‐slip condition, the other one with full slip condition. It is found that the influence of this change on the result is very small.