记忆在断裂中的持久性:普遍性的崩
Pankaj Doshi1, Itai Cohen, Wendy W Zhang
1School of Chemical Engineering, Purdue University, West Lafayette, IN 47907, USA.
概括
粘性液体中低粘度滴的分解产生了独特的奇点. 有限的内部粘度改变了这个过程,形成了长而细的线程,并防止了奇点切断.
科学领域:
- 流体动力学 流体动力学
- 类风病学 类风病学 类风病学
- 复杂的流体行为 复杂的流体行为
背景情况:
- 粘性液体中的气泡,如糖或蜂蜜,表现出复杂的分解动态.
- 以前关于滴裂的研究通常假定内部粘度可以忽略不计,从而导致普遍奇点预测.
研究的目的:
- 为了研究粘性流体中低粘度滴的分解过程中的奇点形成.
- 探索内部和外部粘度对滴裂动态和普遍性的影响.
主要方法:
- 在粘性介质中对气泡破裂的实验观测.
- 计算流体动力学 (CFD) 模拟.
- 流体流动和奇点发展的理论分析.
主要成果:
- 没有内部粘度的分解会导致一个特殊的奇点,破坏普遍性并保留初始/边界条件的印记.
- 有限的内部粘度,无论多么小,都会抑制这种奇点,形成一个长而纤细的线程.
- 在高外部粘度的系统中,随着下降半径接近亚原子尺度,奇点切线被绕过.
结论:
- 内部粘度的存在从根本上改变了点滴破裂奇点,挑战了普遍预测.
- 粘度比率和边界条件在确定滴碎的最后阶段中起着至关重要的作用.
- 这项研究揭示了在复杂的粘性环境中控制流体接口的新机制.
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