Resuspension of particles in an oscillating grid turbulent flow using PIV and 3D-PTV

H. Traugott*, T. Hayse, A. Liberzon

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

Abstract

Description of the mechanisms responsible for the initiation of particle motion from a surface and re-entrainment of particles into suspension remains a challenge, partially due to the technical difficulties to quantify the forces applied on the particles and the collection of high resolution data of particle displacements simultaneously. In this study we explore the process of initial entrainment of spherical particles from smooth beds into zero-mean-shear turbulent flow in an oscillating grid chamber. Particle image velocimetry (PIV) and three-dimensional particle tracking velocimetry (3D-PTV) are used to correlate in a quantitative manner the turbulent flow properties responsible for pick-up, detachment and re-entrainment of particles. The results are compared to the existing models of critical shear velocity and provide further insight into the resuspension process of spherical particles in the transitional range of particle size Reynolds numbers 2 ≤ Rep ≤ 500.

Original languageEnglish
Article number052021
JournalJournal of Physics: Conference Series
Volume318
Issue numberSECTION 5
DOIs
StatePublished - 2011
Event13th European Turbulence Conference, ETC13 - Warsaw, Poland
Duration: 12 Sep 201115 Sep 2011

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