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Article Dans Une Revue Physical Review Fluids Année : 2023

Aggregation and disaggregation processes in clusters of particles under flow: Simple numerical and theoretical insights

Résumé

Aggregation and disaggregation of clusters of attractive particles under flow are studied from numerical and theoretical points of view. Two-dimensional molecular dynamics simulations of both Couette and Poiseuille flows highlight the growth of the average steady-state cluster size as a power law of the adhesion number, a dimensionless number that quantifies the ratio of attractive forces to shear stress. Such a power-law scaling results from the competition between aggregation and disaggregation processes, as already reported in the literature. Here we rationalize this behavior through a model based on an energy function, which minimization yields the power-law exponent in terms of the cluster fractal dimension, in good agreement with the present simulations and with previous works.

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hal-04384086 , version 1 (10-01-2024)

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Louis-Vincent Bouthier, Romain Castellani, Sébastien Manneville, Arnaud Poulesquen, Rudy Valette, et al.. Aggregation and disaggregation processes in clusters of particles under flow: Simple numerical and theoretical insights. Physical Review Fluids, 2023, 8 (2), pp.023304. ⟨10.1103/PhysRevFluids.8.023304⟩. ⟨hal-04384086⟩
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