成人导航

报告题目：Model reduction in two-phase flow problems using the Onsager principle

报告人：陈宇娟 讲师

报告时间：2026年4月25日上午9：00

报告地点：成人导航 304

邀请人：肖思

邀请单位：成人导航 成人导航

报告摘要：Two-phase flow systems exhibit rich interfacial dynamics, where droplet and bubble shape evolution is governed by a delicate balance between driving forces and dissipative mechanisms. Capturing these dynamics with reduced computational cost, while preserving physical fidelity, remains a major challenge. In this talk, I present recent progress on model reduction for interfacial flows based on the Onsager variational principle. The first part focuses on droplet motion on inclined substrates, where a data-driven reduced-order model integrates Onsager’s framework with Functional Principal Component Analysis, enabling accurate prediction of complex morphologies beyond classical continuum descriptions. The second part addresses bubble dynamics in Hele-Shaw cells, where generalized Onsager modeling reveals size-dependent shape transitions and highlights the critical role of Bretherton-type boundary dissipation. Together, these studies demonstrate how Onsager-based approaches provide a systematic pathway to efficient, predictive, and physically consistent reduced models for two-phase flow problems.

报告人简介：陈宇娟，国防科技大学理学院讲师。主要研究方向为两相流问题中的可计算建模与数值方法，一些研究成果发表在PHYSICS OF FLUIDS等权威期刊。

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