Abstract Experiments are performed on dilute polymer solutions jetting into quiescent air with a jet velocity range of 30–87 m/s. Polymer solutions are those with several hundred ppm concentrations of long-chain polyoxyethylene (millions of molecular weight) dissolved in purified water. The breakup characteristics of the jets were recorded by high-speed photography from four observation windows along the jet direction. The breakup morphologies of dilute polymer solution jets are significantly different from that of Newtonian fluids. Small-scale interfacial disturbances are suppressed, while a twisted liquid column waving with large amplitudes is observed. When the jet velocity exceeds a critical value, liquid films and filaments are peeled off successively from the liquid column. Four different breakup patterns are distinguished. The diameters of the central liquid column and the principal liquid filament are observed to decrease with increasing jet velocity.

中文翻译：

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稀聚合物溶液的圆形液体射流在静止空气中的实验破裂特性

摘要 对以 30-87 m/s 的喷射速度范围喷射到静止空气中的稀聚合物溶液进行了实验。聚合物溶液是在纯净水中溶解有数百 ppm 浓度的长链聚氧乙烯（数百万分子量）的溶液。通过沿射流方向的四个观察窗的高速摄影记录了射流的破碎特性。稀聚合物溶液射流的破裂形态与牛顿流体的破裂形态有显着差异。小尺度的界面扰动被抑制，同时观察到大振幅扭曲的液柱波动。当射流速度超过临界值时，液膜和细丝相继从液柱上剥离。区分四种不同的分手模式。