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dc.contributor.authorBalcázar Arciniega, Néstor
dc.contributor.authorCastro González, Jesús
dc.contributor.authorRigola Serrano, Joaquim
dc.contributor.authorOliva Llena, Asensio
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Màquines i Motors Tèrmics
dc.identifier.citationBalcázar, N., Castro, J., Rigola, J., Oliva, A. DNS of the wall effect on the motion of bubble swarms. A: International Conference on Computational Science. "Procedia computer science, volume 108. International Conference on Computational Science, ICCS 2017, 12-14 June 2017, Zurich, Switzerlan". Elsevier, 2017, p. 2008-2017.
dc.description.abstractThis paper presents a numerical study of the gravity-driven motion of single bubbles and bubble swarms through a vertical channel, using High-Performance Computing (HPC) and Direct Numerical Simulation (DNS) of the Navier-Stokes equations. A systematic study of the wall effect on the motion of single deformable bubbles is carried out for confinement ratios CR = {2,4,6} in both circular and square channels, for a broad range of flow conditions. Then, the rising motion of a swarm of deformable bubbles in a vertical channel is researched, for void fractions a = {8.3%, 10.4%, 12.5%} and CR = {4, 6}. These simulations are carried out in the framework of a novel multiple marker interface capturing approach, where a conservative level-set function is used to represent each bubble. This method avoids the numerical and potentially unphysical coalescence of the bubbles, allowing for the collision of the fluid particles as well as long time simulations of bubbly flows. Present simulations are performed in a periodic vertical domain discretized by 2 × 106 control volumes (CVs) up to 16.6 × 106 CVs, distributed in 128 up to 2048 processors. The collective and individual behavior of the bubbles are analyzed in detail.
dc.format.extent10 p.
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.subjectÀrees temàtiques de la UPC::Informàtica
dc.subject.lcshComputational fluid dynamics
dc.subject.otherBubble swarm
dc.subject.otherLevel-set method
dc.subject.otherUnstructured meshes
dc.titleDNS of the wall effect on the motion of bubble swarms
dc.typeConference report
dc.subject.lemacDinàmica de fluids -- Simulació per ordinador
dc.contributor.groupUniversitat Politècnica de Catalunya. CTTC - Centre Tecnològic de la Transferència de Calor
dc.description.peerreviewedPeer Reviewed
dc.rights.accessOpen Access
dc.description.versionPostprint (published version)
upcommons.citation.authorBalcázar, N., Castro, J., Rigola, J., Oliva, A.
upcommons.citation.contributorInternational Conference on Computational Science
upcommons.citation.publicationNameProcedia computer science, volume 108. International Conference on Computational Science, ICCS 2017, 12-14 June 2017, Zurich, Switzerlan

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