Reconstructing the fluid flow by tracking of large particles

Francesco Romanò (1)

1 LMFL - Laboratoire de Mécanique des Fluides de Lille - Kampé de Fériet

All the methods which estimate the unperturbed fluid flow velocity relying on particle suspensions address the same question: How can the fluid velocity be computed measuring the particles trajectory and/or their velocities? The tracking of a few large density-mismatched particles is here used to efficiently and accurately reconstruct the background fluid flow. Approximating the particulate phase space and taking the limit of vanishing Stokes number St -> 0, we retrieve the background flow for three test cases: a shear flow near a wall, a rigid-body vortex, and a strained vortex. The major advantages and the potentials of this approach are discussed in the end, highlighting how to overcome the classic shortcomings of experimental measurements faced for near-boundaries particle tracking.

Mots clés: Particle-laden flows; Shear flows; Vortex flows

Domaines: Dynamique des Fluides [physics.flu-dyn]; Mécanique des fluides [physics.class-ph]

Francesco Romanò. Reconstructing the fluid flow by tracking of large particles. Physical Review Fluids, 2019, 4 (10), pp.104301. ⟨hal-02423003⟩