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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。
In this paper, the multi-rod rigid-rod molecular model is used to calculate the complex flow of polymer dilute solution in steady shear flow, planar flow, uniaxial stretching flow and uniaxial stretching in combination with shear flow using the Galerkin method Changeable nature. The calculation results show that the multi rod rod model is promising to be a perfect molecular model to describe the rheological properties of dilute polymer solution. The research in this paper not only makes it possible to use the molecular model instead of the continuous medium constitutive equation to simulate the complex flow of viscoelastic fluid, but also provides a new way to explore the molecular model for describing the polymer concentrated solution.