Stability of the interface between two dynamic phases in capillary flow of linear polymer melts
Stability of the interface between two dynamic phases in capillary flow of linear polymer melts
复制标题
线性聚合物熔体毛细管流动中两个动态相之间界面的稳定性
DOI：
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发表时间：
1987
期刊：
影响因子：
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通讯作者：
T. McLeish
中科院分区：
文献类型：
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作者：
T. McLeish
推广了以前工作1关于聚合物熔体流动中“喷涌效应”的理论解释的结果。一种改进的Doi-Edwards液体在毛细管流的高、低剪切速率相界面上支撑轴对称行波。这些扰动的稳定性被发现受法向应力效应控制，并且可能与某些类型的熔体破裂有关。定性地解释了改变毛细管长度所观察到的影响。
Results of previous work1 on a theoretical explanation of the “spurt effect” in polymer melt flow are extended. A modified Doi—Edwards liquid is shown to support axisymmetric traveling waves on an interface between high and low shear-rate phases in capillary flow. The stability of these perturbations is found to be governed by normal stress effects and may be related to certain types of melt fracture. Observed effects of varying the capillary length are explained qualitatively.