[Rhéologie des mousses aqueuses]
Les mousses aqueuses sont des suspensions de bulles à l'intérieur de phases aqueuses. Leur caractère multiphasique conduit à un comportement rhéologique complexe qui est utile dans de nombreuses applications, depuis la récupération du pétrole jusqu'aux industries alimentaire et cosmétique. Leur structure est très similaire à celle des émulsions, de telle sorte que ces deux types de matériaux partagent des propriétés mécaniques communes. En particulier, la présence de surfactants aux interfaces gaz–liquide mène à des propriétés interfaciales et dissipatives particulières. La rhéologie des mousses constitue un champ de recherche actif et a déjà été évoquée dans plusieurs revues, la plupart d'entre elles couvrant des mesures rhéométriques à l'échelle de la mousse, couplées avec des interprétations à l'échelle locale des bulles et des interfaces. Nous commençons cette revue en suivant cette approche, puis nous tentons de couvrir les caractéristiques multi-échelles des écoulements de mousses liquides, en insistant sur les régimes où des échelles de longueur intermédiaires doivent être prises en compte, ou sur les régimes suffisamment rapides pour que l'écoulement sorte de la limite quasi statique.
Aqueous foams are suspensions of bubbles inside aqueous phases. Their multiphasic composition leads to a complex rheological behavior that is useful in numerous applications, from oil recovery to food/cosmetic processing. Their structure is very similar to the one of emulsions, so that both materials share common mechanical properties. In particular, the presence of surfactants at the gas–liquid interfaces leads to peculiar interfacial and dissipative properties. Foam rheology has been an active research topics and is already reported in several reviews, most of them covering rheometry measurements at the scale of the foam, coupled with interpretations at the local scale of bubbles or interfaces. In this review, we start following this approach, then we try to cover the multiscale features of aqueous foam flows, emphasizing regimes where intermediate length scales need to be taken into account or regimes fast enough regarding internal time scales so that the flow goes beyond the quasi-static limit.
Mot clés : Mousses aqueuses, Rhéologie, Élasticité, Plasticité, Dissipation, Multiéchelle
Benjamin Dollet 1 ; Christophe Raufaste 2
@article{CRPHYS_2014__15_8-9_731_0,
author = {Benjamin Dollet and Christophe Raufaste},
title = {Rheology of aqueous foams},
journal = {Comptes Rendus. Physique},
pages = {731--747},
publisher = {Elsevier},
volume = {15},
number = {8-9},
year = {2014},
doi = {10.1016/j.crhy.2014.09.008},
language = {en},
}
Benjamin Dollet; Christophe Raufaste. Rheology of aqueous foams. Comptes Rendus. Physique, Volume 15 (2014) no. 8-9, pp. 731-747. doi : 10.1016/j.crhy.2014.09.008. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2014.09.008/
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