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dc.contributor.authorLain Beatove, Santiagospa
dc.contributor.authorSommerfeld, Martínspa
dc.coverage.spatialUniversidad Autónoma de Occidente. Calle 25 115-85. Km 2 vía Cali-Jamundíspa
dc.identifier.citationSommerfeld, M., & Lain, S. (2018). Stochastic modelling for capturing the behaviour of irregular-shaped non-spherical particles in confined turbulent flows. Powder Technology, 332, 253-264spa
dc.description.abstractFor calculating dispersed particle-ladenflows in confined systems, the well-known Euler/Lagrange approach ismost suitable. Lagrangian tracking of non-spherical particles with certain shapes is mostly performed by addi-tionally solving for the orientation of particles in theflow and using resistance coefficients (i.e. drag, lift andtorque) which depend on this orientation. For that in many cases theoretical results for Stokesflow aroundsuch particles are used. In practical situations where very often irregular shaped non-spherical particles aretransported in aflow, such an approach cannot be adopted since the particles have mostly a statistical distribu-tion of shape and hence it is difficult to define a major and minor axis of the particles. The novel approach devel-oped here is based on a statistical treatment of thefluid forces and moments acting on irregular-shaped particlesas well as the wall collision process in order to mimic their stochastic behaviour. The required probability distri-bution functions (PDF's) for the resistance coefficients were derived by applying direct numerical simulations(DNS) based on the Lattice-Boltzmann method (LBM). The PDF's for the wall normal and parallel restitution ra-tios were developed based on an experimental analysis of the wall collision of irregular-shaped particles usingstereoscopic high-speed imaging. Preliminary Euler/Lagrange calculations applying these statistical modelswere conducted for a horizontal channelflow laden with irregular-shaped particles and compared to measure-ments. The results revealed that the calculation of the particle phase assuming the standard models for sphericalparticles yields completely wrong cross-stream profiles of particle massflux, an under-prediction of the stream-wise particle mean velocity and an over-prediction of the associatedfluctuating component. The stochasticmodels for theflow resistance coefficients and the wall collision process on the other hand provided much betteragreement with the measurementseng
dc.format.extentpáginas 253-264spa
dc.relationPowder Technology, volumen 332, issue 1, páginas 253-264, (june 2018)
dc.rightsDerechos Reservados - Universidad Autónoma de Occidentespa
dc.sourceinstname:Universidad Autónoma de Occidentespa
dc.sourcereponame:Repositorio Institucional UAOspa
dc.subjectNon-spherical particleseng
dc.subjectIrregular shapeeng
dc.subjectStatistical treatmenteng
dc.subjectEuler/Lagrange approacheng
dc.subjectFluid forceseng
dc.subjectResistance coefficientseng
dc.subjectLattice-Boltzmann methodeng
dc.subjectWall collision processeng
dc.subjectVelocity ratioseng
dc.titleStochastic modelling for capturing the behaviour of irregular-shaped non-spherical particles in confined turbulent flowseng
dc.typeArtículo de revistaspa
dc.subject.lembSpectrum analysiseng
dc.subject.lembAnálisis espectralspa
dc.subject.armarcParticle accelerationeng
dc.subject.armarcAceleración de partículasspa
dc.rights.creativecommonsAtribución-NoComercial-SinDerivadas 4.0 Internacional (CC BY-NC-ND 4.0)spa
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