Repositório Digital

A- A A+

Growth laws and self-similar growth regimes of coarsening two-dimensional foams : transition from dry to wet limits

.

Growth laws and self-similar growth regimes of coarsening two-dimensional foams : transition from dry to wet limits

Mostrar registro completo

Estatísticas

Título Growth laws and self-similar growth regimes of coarsening two-dimensional foams : transition from dry to wet limits
Autor Fortuna, Ismael
Thomas, Gilberto Lima
Almeida, Rita Maria Cunha de
Graner, François
Abstract We study the topology and geometry of two-dimensional coarsening foam with an arbitrary liquid fraction. To interpolate between the dry limit described by von Neumann’s law and the wet limit described by Marqusee’s equation, the relevant bubble characteristics are the Plateau border radius and a new variable: the effective number of sides. We propose an equation for the individual bubble growth rate as the weighted sum of the growth through bubble-bubble interfaces and through bubble-Plateau border interfaces. The resulting prediction is successfully tested, without an adjustable parameter, using extensive bidimensional Potts model simulations. The simulations also show that a self-similar growth regime is observed at any liquid fraction, and they also determine how the average size growth exponent, side number distribution, and relative size distribution interpolate between the extreme limits. Applications include concentrated emulsions, grains in polycrystals, and other domains with coarsening that is driven by curvature.
Contido em Physical review letters. Melville. Vol. 108, no. 24 (June 2012), 248301, 5 p.
Assunto Bolhas
Emulsoes
Espumas
Modelo de Potts
Origem Estrangeiro
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/103675
Arquivos Descrição Formato
000860796.pdf (1.201Mb) Texto completo (inglês) Adobe PDF Visualizar/abrir

Este item está licenciado na Creative Commons License

Este item aparece na(s) seguinte(s) coleção(ões)


Mostrar registro completo

Percorrer



  • O autor é titular dos direitos autorais dos documentos disponíveis neste repositório e é vedada, nos termos da lei, a comercialização de qualquer espécie sem sua autorização prévia.
    Projeto gráfico elaborado pelo Caixola - Clube de Criação Fabico/UFRGS Powered by DSpace software, Version 1.8.1.