Taylor's experiment in a periodically sheared particulate suspension

Mathieu Souzy (1) , Phong Pham (2, 1) , Bloen Metzger (1)

1 IUSTI - Institut universitaire des systèmes thermiques industriels
2 UF|CHE - Department of Chemical Engineering [Gainesville]

We revisit Taylor’s experiment investigating the evolution of a blob of dye in a periodically sheared suspension of non-Brownian particles. Above a critical strain amplitude, particulate suspensions are subject to phase transition where reversibility is lost and particles fail to return to their original positions. We investigate the effect of this transition on the dispersion of a blob of dye. Beyond the critical strain, the dispersion of the blob is found to increase significantly. The dispersion coefficient of the blob of dye is measured and compared to the self-diffusivity coefficient of the particles.

Mots clés: Particulate suspension; low reynolds number; mixing; dispersion; oscillatory flow

Domaines: Mécanique des fluides [physics.class-ph]

Mathieu Souzy, Phong Pham, Bloen Metzger. Taylor's experiment in a periodically sheared particulate suspension. Physical Review Fluids, 2016, 1 (4), pp.042001. ⟨10.1103/PhysRevFluids.1.042001⟩. ⟨hal-01449418⟩