Dynamic break up of soft glassy materials

该项目的灵感来自于当前在复杂流体（如粘土和泥浆）中钻孔时遇到的工业问题。钻井表面的吸积对石油工业的成本和生产力有着巨大的影响，但人们对其基本物理原理的了解有限。我们将实验研究软玻璃材料的动力学，由浓缩颗粒糊/凝胶组成。特别地，我们将研究在不同的时间尺度上流变动力学是如何受到粘弹性和孔隙弹性等关键过程的影响的。利用这一点，我们希望建立对导致界面内聚而非粘接失效的因素的理解。然后，本研究将利用这一认识来研究软玻璃材料的动态破碎，以及这如何导致材料在移动表面上的界面沉积。我们将制定有关沉积量与潜在流变学和动态润湿的结垢论证。

This project is inspired by current industrial problems encountered whilst drilling bore holes in complex fluids such as clays and muds. Accretion on drilling surfaces has a huge impact on cost and productivity for the oil industry, but there is limited understanding of the fundamental physics. We will experimentally investigate the dynamics of soft glassy materials, consisting of concentrated particle pastes / gels. In particular we will study how the rheological dynamics are affected by key processes such as visco-elasticity and poro-elasticity at different timescales. Using this we hope to build up an understanding of factors which result in cohesive rather than adhesive failure at interfaces. This study will then use this understanding to investigate the dynamic break-up of soft glassy materials and how this leads to interfacial deposition of material on moving surfaces. We will formulate scaling arguments relating the amount of deposition to the underlying rheology and dynamic wetting.