The Effect of Viscoelasticity on the Motion of Particles Suspended in Vicoelastic Fluids

摘要CTS-9400737 R.菲利普斯 研究了非牛顿流体对悬浮颗粒间相互作用的影响，以及对悬浮液宏观行为的影响。 流动建模将考虑二阶流体本构关系作为粘弹性流体的极限情况。 更真实的本构关系将在后面的分析中介绍。 斯托克斯动力学模拟将在弱粘弹性流体中使用多球系统进行。 计算结果将与沉降和扩散实验中的颗粒浓度测量结果进行比较，这些实验将使用全息干涉仪和核磁共振成像进行。 拟议的项目与均匀复合材料和涂层的制造有关，特别是从具有悬浮颗粒的聚合物材料。 ***

ABSTRACT CTS-9400737 R. J. Phillips It is proposed to investigate the effect of non-newtonian fluids on the interactions between suspended particles, and on the macroscopic behavior of the suspensions. Flow modeling will consider second-order fluid constitutive relationships as a limit case for viscoelastic fluids. More realistic constitutive relationships will be introduced later in analysis. Stokesian dynamics simulations will be performed with multi-sphere systems in weakly viscoelastic fluids. The computational results will be compared to measurements on particle concentration in the sedimentation and diffusion experiments, which will be performed with a holographic interferometer and nuclear magnetic resonance (NMR) imaging. The proposed project has relevance to the fabrication of homogeneous composite materials and coatings, particularly from polymeric materials having particles in suspension. ***