刚性聚合物稀溶液流变性质的计算 Ⅰ.定常流动

本文采用多棒刚杆分子模型,用Galerkin法计算了聚合物稀溶液在定常剪切流、平面拉伸流、单轴拉伸流、单轴拉伸与剪切流相组合的复杂流动的流变学性质。计算结果表明,多棒刚杆分子模型有希望成为描述聚合物稀溶液流变性质的较为完善的分子模型。本文的研究不仅可使人们用分子模型来代替连续介质本构方程进行粘弹性流体复杂流动的数值模拟,而且也为探讨描述聚合物浓溶液的分子模型提供了一种新的途径。

RHEOLOGY OF DILUTES SOLUTION OF RIGID RODLIKE MACROMOLECULES I. Steady-State Flow

I. Steady-State FlowIn this paper, we accepted the multirod-rod molecular model and used Galerkin's method to calculate the rheological properties of dilute solutions under steady-state shear flow, uniaxial elongational flow and planar elongational flow as well as the complex flow combined shear with uniaxial elongational flow. It is showed that the model is hoped to become a more perfect molecular model describing the rheological properties of dilute solutions. The study in the paper not only enable one to carry out the numerical simulation of complex flow of viscoelastical fluid in terms of molecular models instead of the constitutive equations of continuum mechanics, but also provides a new method for studying the molecular model of concentrated solution of polvmer.