在A + B → C反应前线周围的化学诱导的马兰戈尼对流上产生热效应
A Bigaj1, V Upadhyay1, L Rongy1
1Nonlinear Physical Chemistry Unit, Faculté des Sciences, Université libre de Bruxelles (ULB), CP231, 1050 Brussels, Belgium.
The Journal of chemical physics
|February 13, 2024
概括
化学反应通过改变表面张力来驱动马兰戈尼流. 热效应显著影响这些流动,影响反应扩散系统中的对流模式和非线性动态.
科学领域:
- 流体动力学 流体动力学
- 化学动力学 化学动力学
- 表面现象 表面现象
背景情况:
- 马兰戈尼流是由表面张力梯度驱动的.
- 化学反应改变溶液的组成和温度,导致表面张力变化.
- 了解这些变化对于预测流体行为至关重要.
研究的目的:
- 为了研究由简单的A + B → C反应引起的Marangoni对流.
- 量化溶解和热效应对表面张力的作用.
- 预测热溶性马兰戈尼流中的对流模式.
主要方法:
- 纳维埃-斯托克斯方程和反应-扩散-对流方程的数值集成.
- 包括易斯数来解释热量和质量扩散率.
- 对于表面张力配置文件的非对称分析溶液的导出.
主要成果:
- 由于反应热的热变化显著影响马兰戈尼对流动的动态.
- 建立了基于马兰戈尼数和易斯数的表面张力配置文件的新分类.
- 分析预测通过数值模拟来验证,揭示了额外的极端情况.
结论:
- 热溶性马兰戈尼流体表现出由反应热影响的复杂动态.
- 开发的分类可以预测对流模式.
- 热效应引入非线性动力学和极端的表面张力形状.
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