| 黏弹流体动态黏度数学模型与实验研究 |
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| 引用本文： | 蔡永洪,瞿金平.黏弹流体动态黏度数学模型与实验研究[J].塑料工业,2008,36(Z1). |
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| 作者姓名： | 蔡永洪 瞿金平 |
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| 作者单位： | 1. 中国测试技术研究院广州分院,广州,广东,510640;华南理工大学聚合物成型加工工场教育部重点实验室,广州,广东,510030
2. 华南理工大学聚合物成型加工工场教育部重点实验室,广州,广东,510030 |
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| 摘 要： | 针对经典Maxwell本构模型的局限性进行了相应的非线性修正,提出了一种新的黏弹本构模型,利用修正模型和基于黏性耗散机理建立的黏滞动力方程,得到了振动剪切流场黏弹流体的动态黏度函数.通过将动态黏度函数应用于简单振动剪切流,得到了与传统计算方法相一致的结果.最后,进行了同轴圆筒动态流变实验.实验数据与垂直叠加振动剪切流场中LDPE熔体黏度的理论值进行了对比,发现动态黏度函数在小振幅范围内具有较好的预测能力.
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| 关 键 词： | 黏弹流体 动态黏度 黏性耗散 黏弹流体 动态黏度 数学模型 实验数据 研究 Experimental Investigation Fluids Viscoelastic Viscosity Dynamic 预测能力 范围 小振幅 发现 理论值 熔体黏度 LDPE 叠加 流变实验 同轴圆筒 |
Modeling of Dynamic Viscosity of Viscoelastic Fluids and Corresponding Experimental Investigation |
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| CAI Yong-hong,QU Jin-ping.Modeling of Dynamic Viscosity of Viscoelastic Fluids and Corresponding Experimental Investigation[J].China Plastics Industry,2008,36(Z1). |
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| Authors: | CAI Yong-hong QU Jin-ping |
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| Affiliation: | CAI Yong-hong~(1,2),QU Jin-ping~2 (1.Guangzhou Branch of National Institute of Measuring , Testing Technology,Guangzhou 510640,China,2.The Key Lab.of Polymer Processing Eng.of Ministry of Education,South China University of Technology,Guangzhou 510030,China) |
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| Abstract: | In respect to certain limitation of classic Maxwell constitutive equation,a new nonlinear modification of the viscoelastic constitutive equation was proposed.By using the constitute equation and a viscous dynamic equation,which was characterized by viscous dissipation mechanism,a function of dynamic viscosity of viscoelastic fluids in transient shear flows was derived.Same result was obtained as using the traditional method,when using the dynamic viscosity function to calculate simple vibrating shear flow.F... |
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| Keywords: | Maxwell Fluids Dynamic Viscosity Viscous Dissipation |
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