Abstract
In a previous paper (Boutin and Auriault 1993) the homogenization technique of multiscale expansions was used for investigating how acoustic waves may propagate in a bubbly fluid at finite concentration. Three different equivalent macroscopic behaviours where derived, for “large”, “medium” and “small” bubble systems, respectively. In the present paper, we extend the analysis by taking into consideration possible phase change effects. We show that phase change effects are negligible in the case of “large” bubbles, whereas they strongly modify the “medium” bubble system behaviour by decreasing the bulk modulus of several orders of magnitude. For “small” bubbles, capillary effects are dominating.
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