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Updated: Sep 11, 2025

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Evolution of Staircase Structures in Diffusive Convection
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双扩散对流在一个平面层的低导热率边界的双扩散对流
Sergei Prokopev1, Tatyana Lyubimova2
1Institute of Continuous Media Mechanics, UrB RAS, Academician Korolev Street 1, Perm, Russia, 614013. prokopev.s@icmm.ru.
The European physical journal. E, Soft matter
|August 15, 2025
概括
这项研究揭示了双扩散对流与低导热边界的两个不稳定模式. 研究结果表明,热和度梯度如何影响这些模式,影响流体层的行为.
科学领域:
- 流体动力学 流体动力学
- 热量和质量转移是热量和质量转移.
- 非线性动力学是一种非线性动力学.
背景情况:
- 双扩散对流在各种自然和工业过程中至关重要.
- 了解低导热边界的对流对于精确的建模至关重要.
- 固定的热流条件在分析流体层稳定性方面提出了独特的挑战.
研究的目的:
- 在固定热量流下,研究水平流体层中的双扩散对流,其热导率极限较低.
- 识别和描述不同形式的不稳定性.
- 探索热和度梯度对对流动行为的影响.
主要方法:
- 使用线性稳定性分析来确定不稳定性值.
- 使用非线性建模来确认线性预测,并观察系统演变.
- 在不同的热和度梯度下分析了系统行为.
主要成果:
- 确定了两个主要的不稳定模式:单调和振荡.
- 单调模式,以长波模式为特征,当梯度导致不稳定时占主导地位.
- 当梯度相反时,振荡模式出现,稳定性取决于系统参数.
结论:
- 线性稳定性分析和非线性建模为双扩散对流提供了一致的见解.
- 该研究阐明了在特定边界条件下单调和振荡模式的独特行为.
- 这些发现有助于更深入地了解低导热边界系统中的对流现象.
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