泊肃叶流场中高分子溶液结晶行为的计算模拟

Simulations of Polymer Crystallization in Solutions under Poiseuille Flows

研究流场中高分子溶液的结晶行为是一个复杂的问题。应用格子链动态蒙特卡洛模拟研究泊肃叶流场中高分子溶液的结晶。通过非对称性抽样引入泊肃叶流场,改变流场的大小考察其对高分子溶液结晶的影响。结果表明流场的大小对结晶速度的影响不是单一的,而是存在一个临界值,流场大小低于该临界值则加速结晶,高于该临界值,则流场增大反而使结晶速度变慢。在外加流场中高分子结晶沿着流场方向明显取向。

It’s complicated to study polymer crystallization in solutions under flows. Monte Carlo simulations was used in this paper to study polymer crystallization under Poiseuille flows. Poiseuille flows were introduced through asymmetric sampling and effects of flows with different strength on crystallization were studied. Results shown that there was a critical point of flow strength： below this critical point,crystallization was accelarated with a bigger flow strength; above it,however,crystallization was slowed down.