FAST, NONEVOLUTIONARY DYNAMICS IN FOAMS

The advent of new experimental probes such as diffusing-wave spectrosc opy is permitting rapid progress in our understanding of dynamics in f oams. In addition to evolution mechanisms, this includes faster proces ses such as thermal fluctuations in the shapes of the bubbles as well as neighbor-switching rearrangements in the bubble-packing structure i tself. These collective phenomena have important connections to the ma croscopic mechanical properties of foams, upon which most applications are based.