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Particleboundary interaction in a shear-driven cavity flow
Verfasser / Verfasserin Francesco, Romanò ; Kuhlmann, Hendrik C.
Erschienen in
Theoretical and Computational Fluid Dynamics, 2017, Jg. 31, H. 4, S. 427-445
ErschienenSpringer Nature, 2017
DokumenttypAufsatz in einer Zeitschrift
Schlagwörter (EN)Particleboundary interaction / Shear stress / Fully resolved simulation / DG-FEM / SPM / Particle accumulation / Limit cycle
URNurn:nbn:at:at-ubtuw:3-4192 Persistent Identifier (URN)
 Das Werk ist frei verfügbar
Particleboundary interaction in a shear-driven cavity flow [4.37 mb]
Zusammenfassung (Englisch)

The motion of a heavy finite-size tracer is numerically calculated in a two-dimensional shear-driven cavity. The particle motion is computed using a discontinuous Galerkin-finite-element method combined with a smoothed profile method resolving all scales, including the flow in the lubrication gap between the particle and the boundary. The centrifugation of heavy particles in the recirculating flow is counteracted by a repulsion from the shear-stress surface. The resulting limit cycle for the particle motion represents an attractor for particles in dilute suspensions. The limit cycles obtained by fully resolved simulations as a function of the particle size and density are compared with those obtained by one-way coupling using the MaxeyRiley equation and an inelastic collision model for the particleboundary interaction, solely characterized by an interaction-length parameter. It is shown that the one-way coupling approach can faithfully approximate the true limit cycle if the interaction length is selected depending on the particle size and its relative density.

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