Le transfert de masse à partir de particules présente de nombreuses applications biomédicales. En conditions opérationnelles, les particules sont soumises à des écoulements de fluides de différentes natures, dont l’effet sur le transport du soluté est aujourd’hui encore mal connu. Dans cet article nous considérons le transfert de masse à partir de capsules sphériques et de fibres noyau-coque soumises à différentes conditions d’écoulement. Les effets combinés de l’écoulement et de la perméabilité de la coque des particules sur l’efficacité du transfert sont analysés et quantifiés par des corrélations pour le nombre de Sherwood (le coefficient de transfert de masse adimensionnel). La perméabilité des particules influence fortement l’efficacité du transfert, mais elle est difficilement mesurable. Une nouvelle méthode de caractérisation de la perméabilité de la coque des capsules est proposée et validée sur des données expérimentales. Tous les résultats obtenus peuvent être appliqués au transfert de chaleur vers ou depuis des particules soumises à des écoulements.
Mass transfer from particles is encountered in many biomedical applications. In operating conditions, particles are subjected to flows whose effect on solute transport is still not well understood. In this article we consider mass transfer from core-shell capsules and fibers subjected to various flow conditions. The combined effects of the flow and the shell permeability on the mass transfer efficiency are analyzed and quantified by correlations for the Sherwood number (the dimensionless mass transfer coefficient). The permeability is found to significantly affect the mass transfer efficiency, but it is a hardly measurable quantity. A new characterization method is proposed and validated using experimental data. All the obtained results can be applied to heat transfer from or to particles subjected to flow.
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Keywords: mass transfer, heat transfer, flow, forced convection, capsules, fibers, Mmembranes, permeability
CC-BY 4.0
@article{CRMECA_2023__351_S3_A6_0,
author = {Cl\'ement Bielinski and Badr Kaoui},
title = {Transfert de masse non-stationnaire depuis des particules sous \'ecoulement},
journal = {Comptes Rendus. M\'ecanique},
publisher = {Acad\'emie des sciences, Paris},
year = {2023},
doi = {10.5802/crmeca.204},
language = {fr},
note = {Online first},
}
Clément Bielinski; Badr Kaoui. Transfert de masse non-stationnaire depuis des particules sous écoulement. Comptes Rendus. Mécanique, Online first (2023), pp. 1-12. doi : 10.5802/crmeca.204.
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