EPJ Web Conf.
Volume 249, 2021Powders & Grains 2021 – 9th International Conference on Micromechanics on Granular Media
|Number of page(s)||4|
|Section||Fluids and Particles|
|Published online||07 June 2021|
Solute transport by suspended buoyant particles
Grupo de Medios Porosos, Facultad de Ingeniería, Universidad de Buenos Aires, CONICET, Paseo Colón 850, (C1063ACV) Buenos Aires, Argentina.
* Corresponding author: email@example.com
Published online: 7 June 2021
The transport of a colouring solute, driven by the buoyant displacement of microscopic suspended particles, and in the absence of net flow, is studied experimentally in a Hele Shaw cell. Initially, a sharp interface between a transparent fluid without particles and an underlying coloured suspension is obtained. From this situation, the suspended particles rise, carrying the solute in the form of a fingering instability across the interface, where a light transmission technique is used to measure the local solute concentration. This one attains an asymptotic value that increases with the solid fraction ϕ of suspended particles, and decreases with the distance to the interface. The solute mass discharge also increases with ϕ, always being relatively small (< 3%). The onset and development of the instability as the mechanism driving the transport of the solute is discussed.
A video is available at https://doi.org/10.48448/en5x-9j84
© The Authors, published by EDP Sciences, 2021
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