Micro-mechanical prediction of the effect of surfactant concentration and external friction on the visco-elasto-plastic response of an aqueous foam

Abstract

The present model predicts rheological response of dry aqueous foam, including as a novelty the dissipative effects at the interface.

Scaling law for the kinetics of water imbibition in polydisperse foams

“…In the late stage of imbibition, the tip of imbibition reached the other side of the foam (Fig. 4c), and all of the bubbles became spherical in shape (images [7][8][9]. The correlations between the imbibition length and estimated water volume fraction 3 water at three different positions are shown in Fig.…”

“…6,7 To understand the complicated properties of foams, theoretical approaches have also been used to describe deformation of the bubbles 8 and the response to shear elds. 9 These are only a few examples, but they clearly show the unique properties of foams originating from the gas-liquid interfaces.…”

The evolution of numerical methods for predicting the distribution of surfactant in the bubble-scale dynamics of foams

“…Our own work now concerns the scaling up of VFM calculations which incorporate curved films and surfactant transfer throughout the foam [49] to predict the complex moduli of bulk foams in the dry limit. There is also much scope to extend vertex model calculations [41] with additional filmlevel surfactant dynamics.…”