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Structure and dynamics of breaking foams

By G.D. Burnett, J.J. Chae, W.Y. Tam, Rita Maria Cunha de Almeida and M. Tabor


Experimental results are presented for the relaxation of a two dimensional soap foam in which wall breakage is initiated through gentle warming of the foam cell. Significantly different phenomenology from the relaxation of nonbreaking foams is observed. At a critical "break time," which depends on the temperature ramping rate and initial conditions, a large scale mechanical cascade of wall rupture sets in, leading to a rapid disintegration of the foam. In the cascade regime, whose behavior is essentially independent of the ramping rate, a dynamical scaling behavior, associated with the distribution of cell edge lengths, is proposed

Topics: Fisica da materia condensada, Espumas : Aerossois, Polimerizacao
Year: 2014
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