对二元流体对流的数值分析,其中包括热和溶液的侧向梯度
Juan Sánchez Umbría1, Marta Net2
1Universitat Politècnica de Catalunya, Departament de Física, Jordi Girona Salgado 1-3, Campus Nord, Mòdul B4, 08034 Barcelona, Spain.
Physical review. E
|February 7, 2025
概括
这项研究探讨了溶液梯度如何影响加热槽中的流体动力学,揭示了复杂的稳定和周期性行为. 热浮力是恢复流动和影响混乱过渡的关键.
科学领域:
- 流体动力学 流体动力学
- 热力学是一种热力学.
- 非线性动力学是一种非线性动力学.
背景情况:
- 二元流体动力学是复杂的,受热和溶液梯度的影响.
- 索雷特和杜福效应引入了合的热量和质量转移现象.
- 了解加热流体系统中的稳定性和转变是至关重要的.
研究的目的:
- 分析横向强制施加的溶质梯度对加热槽中的流体动力学的影响.
- 调查稳定和分叉周期动态,包括索雷特和杜福效应.
- 检查各种流动状态和过渡到混乱的稳定性.
主要方法:
- 使用了数值牛顿-克里洛夫连续技术.
- 分析重点是稳定溶液和周期轨道的初级和二级分支.
- 对所有已识别的解决方案分支进行了稳定性分析.
主要成果:
- 观察到广泛的稳定稳定和周期性状态,取决于热和溶液梯度比.
- 溶解梯度可以延迟振荡并恢复稳定的流动,从而导致复杂的波浪模式.
- 热浮力显著影响流动的恢复稳定和动态,影响过渡到混乱.
结论:
- 溶解梯度在塑造加热二元流体的动态方面发挥着至关重要的作用.
- 热浮力和溶解梯度之间的相互作用决定了流动的稳定性和复杂性.
- 溶质梯度的缺失或强度强烈地影响了过渡到时间混乱.
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