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A Numerical Study of Phase Transitions Inside the Pores of Aerogels
Katarina Uzelac, Anwar Hasmy, Rémi Jullien
Phase transitions inside the pores of an aerogel are investigated by modelizing the aerogel structure by diffusion-limited cluster-cluster aggregation on a cubic lattice in a finit…
Small Angle Neutron Scattering of Aerogels: Simulations and Experiments
Anwar Hasmy, Marie Foret, Eric Anglaret +3
A numerical simulation of silica aerogels is performed using diffusion-limited cluster-cluster aggregation of spheres inside a cubic box (with periodic boundary conditions). The vo…
The Sol-Gel Process Simulated by Cluster-Cluster Aggregation
Anwar Hasmy, Rémi Jullien
The pair-correlation function and its Fourier transform, the structure factor , are computed during the gelation process of identical spherical particles using the…
Gas Transport in Porous Media: Simulations and Experiments on Partially Densified Aerogels
Anwar Hasmy, Isabelle Beurroies, Daniel Bourret +1
The experimental density dependence of gas (argon and nitrogen) permeability of partially densified silica aerogels in the Knudsen regime is quantitatively accounted for by a compu…
Scaling Theory and Numerical Simulations of Aerogel Sintering
Rémi Jullien, Nathalie Olivi-Tran, Anwar Hasmy +4
A simple scaling theory for the sintering of fractal aerogels is presented. The densification at small scales is described by an increase of the lower cut-off length accompanie…