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• W3099283720 abstract "We perform computational studies of jammed particle packings in two dimensions undergoing isotropic compression using the well-characterized soft particle (SP) model and the deformable particle (DP) model that we developed for compressed bubbles and emulsions. In the SP model, circular particles are allowed to overlap, generating purely repulsive forces. In the DP model, particles minimize their perimeter, while deforming at fixed area to avoid overlap during compression. We directly compare the structural and mechanical properties of jammed particle packings generated using the SP and DP models as a function of the true packing fraction $rho$, instead of the reduced number density $phi$. We show that near jamming onset the excess contact number $Delta z=z-z_J$ and shear modulus ${cal G}$ scale as $Delta rho^{0.5}$ in the large system limit for both the SP and DP models, where $Delta rho = rho-rho_J$ and $z_J approx 4$ and $rho_J approx 0.842$ are the values at jamming onset. $Delta z$ and ${cal G}$ for the SP and DP models begin to differ for $rho gtrsim 0.88$. In this regime, $Delta z sim {cal G}$ can be described by a sum of two power-laws in $Delta rho$, i.e. $Delta z sim {cal G} sim C_0Delta rho^{0.5} +C_1Delta rho^{1.0}$ to lowest order. We show that the ratio $C_1/C_0$ is much larger for the DP model compared to to that for the SP model. We also characterize the void space in jammed packings as a function of $rho$. We find that, unlike the SP model, the DP model is able to describe the formation of Plateau borders as the system approaches $rho = 1$. We further show that the results for $z$ and the shape factor ${cal A}$ versus $rho$ for the DP model agree with recent experimental studies of compressed foams and emulsions." @default.
• W3099283720 created "2020-11-23" @default.
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• W3099283720 date "2019-01-01" @default.
• W3099283720 modified "2023-10-17" @default.
• W3099283720 title "The role of deformability in determining the structural and mechanical properties of bubbles and emulsions" @default.
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• W3099283720 doi "https://doi.org/10.1039/c9sm00775j" @default.
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