Aggregation and disaggregation processes in clusters of particles: simple numerical and theoretical insights of the competition in 2D geometries
| Autor: | Bouthier, Louis-Vincent, Castellani, Romain, Manneville, Sébastien, Poulesquen, Arnaud, Valette, Rudy, Hachem, Elie |
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| Rok vydání: | 2022 |
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| Druh dokumentu: | Working Paper |
| Popis: | 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. Comment: 13 pages, 6 figures |
| Databáze: | arXiv |
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