从接口动力学到达西尺度,描述多相流在多孔介质中的多相流
Steffen Berg1, Ryan T Armstrong2, Maja Rücker3
1Shell Global Solutions International B.V., Grasweg 31, Amsterdam, 1031WG, The Netherlands; Porelab, Norwegian University of Science and Technology, Department of Physics, S.P. Andersens vei 15B, Trondheim, N-7491, Norway; Imperial College London, Department of Earth Science and Engineering, London, SW7 2BP, United Kingdom.
Advances in colloid and interface science
|February 10, 2026
概括
这项研究通过整合热力学方法来描述各种流动模式,在多孔介质中推进了多相流. 新的方法捕捉波动和间歇性,改善运输方程的发展超出了传统的达西定律的限制.
科学领域:
- 合体和接口科学科学
- 孔隙介质物理学的物理
- 多相流动动力学 多相流动力学
背景情况:
- 多相流在多孔介质中存在挑战,因为表面积大,孔结构复杂,导致不同的流动模式.
- 传统的宏观双相流量模型,达西定律的扩展,仅限于特定的流量模式,并不能完全捕捉接口动态.
- 将孔尺度物理升级为所有流动模式的达西尺度描述仍然是一个重大的科学挑战.
研究的目的:
- 开发一个统一的理论框架来描述多相流在所有多孔介质中占主导地位的制度.
- 整合热力学原理和先进的统计方法,以克服现有现象学模型的局限性.
- 通过结合波动,间歇性和非平衡效应,为改进的运输方程提供基础.
主要方法:
- 应用时空平均和扩展非平衡热力学理论 (NET) 对毛细血管主导的流量 (模式I).
- 使用统计热力学用于带有动力学和间歇性的非线性流动模式 (模式II).
- 采用NET和统计热力学用于粘性极限流量模式 (模式III),包括波动分散定理和Onsager相互关系.
主要成果:
- 成功描述了三种主要流动模式:毛细血管主导,非线性和粘性极限,每个都有不同的物理和适用的理论方法.
- 新的方法本质上包括波动和间歇性,避免了传统模型的先前限制性假设.
- 热力学接地被证明有潜力限制相对透性的功能形式,并取代经验性的歇斯底里模型.
结论:
- 热力学概念为描述多相复杂流体现象在多孔介质中的各种模式提供了坚实的基础.
- 未来的工作重点应该是利用协同运动速度和统计热力学来简化测量协议并提高模型准确性.
- 这种方法为各种应用中的合运输现象开辟了新的可能性,超越了达西定律的局限性.
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