Complex fluid-fluid interfaces play an important role in a variety of application domains, from emulsion and foam stability, to thin films in biomedical applications, to coating flow phenomena. The current work reviews progress made in particular for interfaces where rheological stresses, peculiar to the interface, play an important role. The developments made in the area of constitutive modeling are briefly reviewed to clarify which material functions can be measured. For shear rheometry, progress in analyzing the flow field in the measurement device has been key, combined with advances in control over surface concentration and microstructural evaluation. For dilation/compressional rheometry much work has been done on separating changes in the surface tension from the extra rheological stresses. Finally, we discuss how “simple complex flows”, such as thin film and drainage flows, offer a first step up in complexity and seem to present a good benchmark problem for testing constitutive equations and the interplay between transport phenomena, interfacial rheology and the changes in state variables.

复杂的流体界面在各种应用领域中都起着重要作用，从乳液和泡沫的稳定性到生物医学应用中的薄膜，再到涂层流动现象。当前的工作回顾了特别是在界面方面的进展，其中界面所特有的流变应力起着重要的作用。简要回顾了本构模型领域的发展，以阐明可以测量的材料功能。对于剪切流变学来说，结合测量表面浓度和微结构评估方面的进展，在分析测量设备中的流场方面取得进展是关键。对于膨胀/压缩流变学，已经做了很多工作来将表面张力的变化与额外的流变应力分开。最后，我们讨论“简单复杂流”的方式，