Spatio-temporal variability in the lubrication of complex flows

在工业或地球物理的许多环境中，复杂剪切变薄或屈服应力流体的流体流动是横向广泛的，因此它们的行为在很大程度上反映了驱动力和与基底接触所施加的应力之间的平衡。在某些情况下，耦合流到基材的应力条件是未知的，或者在时间和空间上可能是高度可变的。该项目将通过理论、实验和数据分析相结合的方法，通过仔细研究表面速度场，可以对与基底的耦合做出哪些定量推断。将特别注意孔隙弹性或塑性基材及其对表面速度场的影响。

In many settings, industrial or geophysical, fluid flows of complex shear thinning or yield-stress fluids are laterally extensive so that their behaviour largely reflects a balance between the driving forces and the stress exerted by contact with the substrate. In some cases, that stress condition coupling the flow to the substrate is either unknown, or may be highly variable in time and in space. This project will examine, through a combination of theoretical, experimental and data analysis, what quantitative inferences may be made about the coupling with the substrate through careful study of the surface velocity field. Particular attention will be given to poroelastic or plastic substrates, and their impact on the surface velocity field.