Scattering Experiments in Fluid Mixtures

统一的主题是相位随机性的影响 过渡。 多孔介质施加随机化学势 在包含在孔隙内的二元混合物上。 需的时间 对于这样的系统达到平衡， 由随机介质引起的亚稳态。 另一种情况是 混合物在相分离附近的湍流搅拌 温度 随机性可以扩大或锐化这样的 相变 在另一种实验中， 从无序（混沌）状态的流动中退出过渡 到一个新的领域，速度谱显示， 自相似性 少量的 将研究添加到湍流流体中的聚合物。

The unifying theme is the effect of randomness in phase transitions. A porous medium imposes a random chemical potential on a binary mixture contained within pores. The time required for such a system to reach equilibrium is increased by metastability induced by the random medium. Another case is turbulent stirring of a mixture near its phase separation temperature. Randomness can either broaden or sharpen such a phase transiton. In another type of experiment there is evidence that a transition exits from a disordered (chaotic) state of flow of a fluid to a new domain where the velocity spectrum exhibits self-similarity. The quenching effect of a small amount of polymer added to a turbulent fluid will be studied.