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International audienceWe present a jointed experimental and numerical study examining the influence of vortical structures on the settling of solid spherical particles under the action of gravity at low Stokes numbers. The two-dimensional model experiment uses electroconvection to generate a two-dimensional array of controlled vortices which mimics a simplified vortical flow. Particle image-velocimetry and tracking are used to examine the motion of the particles within this vortical flow. Particle motion is compared to the predictions of a numerical simulation inspired by the model equation developed by Maxey ["The motion of small spherical particles in a cellular flow field," Phys. Fluids 30, 1915 (1987)]

The motion of solid spherical particles falling in a cellular flow field at low Stokes number