Numerical simulations of sintering, application to partially densified aerogels View Full Text


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Article Info

DATE

1997-02

AUTHORS

N. Olivi-Tran, R. Jullien

ABSTRACT

Following recent scaling theories, the sintering of silica aerogels in modeled starting from computer generated gel structures obtained by diffusion-limited cluster-cluster aggregation on a cubic lattice. Two steps compose the sintering process model: a “dressing” step in which all particles are replaced by overlapping larger particles and a “contraction” step in which an adequate length rescaling is performed in order to conserve the total mass. Several quantities are computed during sintering as a function of the aerogel density such as the two characteristic cut-off lengths (lower and upper limits of the fractal regime) and the specific interface area. Comparison is made with results of similar off-lattice calculations when available. Some of the numerical results are compared with experiments on partially densified base-catalysed aerogels. More... »

PAGES

813-817

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/bf02436943

DOI

http://dx.doi.org/10.1007/bf02436943

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1043102055


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