Physics – Condensed Matter – Materials Science
Scientific paper
1996-03-12
Physics
Condensed Matter
Materials Science
RevTeX with psfig-included figures and a galley macro
Scientific paper
10.1103/PhysRevLett.76.3448
We present a new model to describe the unusual elastic properties of compressed emulsions. The response of a single droplet under compression is investigated numerically for different Wigner-Seitz cells. The response is softer than harmonic, and depends on the coordination number of the droplet. Using these results, we propose a new effective inter-droplet potential which is used to determine the elastic response of a monodisperse collection of disordered droplets as a function of volume fraction. Our results are in excellent agreement with recent experiments. This suggests that anharmonicity, together with disorder, are responsible for the quasi-linear increase of $G$ and $\Pi$ observed at $\varphi_c$.
Grest Gary S.
Lacasse Martin-Daniel
Levine Dov
Mason Thomas G.
Weitz David A.
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