Experimental growth law for bubbles in a "wet" 3D liquid foam

Abstract

We used X-ray tomography to characterize the geometry of all bubbles in a liquid foam of average liquid fraction ${\varphi }_l\approx 17$ and to follow their evolution, measuring the normalized growth rate $\mathcal{G}=V^{-1/3}\frac{dV}{dt}$ for 7000 bubbles. While $\mathcal{G}$ does not depend only on the number of faces of a bubble, its average over $f-$faced bubbles scales as $G_f\sim f-f_0$ for large $f$s at all times. We discuss the dispersion of $\mathcal{G}$ and the influence of $V$ on $\mathcal{G}$.

10 pages, submitted to PRL

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