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首页> 外文期刊>International Journal of Engineering Science >Isothermal tube flow of non-linear viscoelastic fluids. Part I:Constitutive instabilities and the longitudinal field
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Isothermal tube flow of non-linear viscoelastic fluids. Part I:Constitutive instabilities and the longitudinal field

机译：非线性粘弹性流体的等温管流动。第一部分：本构不稳定性和纵向场

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摘要

Theories and attendant methodologies developed independently of thermodynamic considerations and set within a thermodynamic framework to derive rheological constitutive equations for viscoelastic fluids have been reviewed in their historical context. The stability of Maxwell-like differential and single integral type constitutive formulations in current use and their relationship to experimentally observed physical instabilities are reviewed in particular in the light of inherent Hadamard and dissipative type of instabilities they may be subject to as a consequence of defective constitutive formulations. The state of the art in predicting the longitudinal field, the pressure drop and the friction factors for the flow of generalized Newtonian and viscoelastic fluids in circular and non-circular straight tubes is reviewed.
机译：与热力学无关的理论和伴随的方法论已经在其历史背景下进行了回顾，这些理论和伴随的方法论是在热力学框架内建立的，以得出粘弹性流体的流变本构方程。尤其是根据固有的Hadamard和耗散类型的不稳定性，由于存在缺陷的本构性，对目前使用的麦克斯韦式微分和单一整数型本构关系的稳定性及其与实验观察到的物理不稳定性的关系进行了综述。配方。综述了预测纵向牛顿流体和粘弹性流体在圆形和非圆形直管中流动的纵向场，压降和摩擦因数的技术现状。

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