New Advances in Physics-Informed Machine Learning

A special issue of Mathematics (ISSN 2227-7390). This special issue belongs to the section "E4: Mathematical Physics".

Deadline for manuscript submissions: 30 November 2026 | Viewed by 743

Special Issue Editor


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Guest Editor
College of Civil Engineering ,Central South University, Changsha 410083, China
Interests: AI for science; physical data dual-driven neural network

Special Issue Information

Dear Colleagues,

Artificial intelligence methods have recently evolved into a dominant approach for solving differential equations, finding widespread applications across various applied mathematics fields such as fluid mechanics, optics, and engineering, known as physics-informed machine learning (PIML) methods. While PIML has demonstrated significant advantages over traditional numerical methods—including the ability to solve unsteady solutions and inverse problems of partial differential equations and even directly derive differential equations from pure data—it still faces critical challenges that require urgent solutions, such as increased complexity and optimization difficulties of loss functions when dealing with large computational domains (with an increased number of residual points), as well as issues of low accuracy and slow computation in operator learning for batch PDE solutions. To address these bottlenecks, the journal Mathematics issues a Special Issue entitled "New Advances in Physics-Informed Machine Learning", which aims to publish the latest progress in PIML approaches for solving differential equations.

Dr. Jingjing Su
Guest Editor

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Keywords

  • AI for science
  • AI for PDE
  • physics-informed machine learning
  • operator learning
  • neural network
  • nonlinearity

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Published Papers (1 paper)

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Research

27 pages, 13344 KB  
Article
Performance of PINN Framework for Two-Phase Displacement in Complex Casing–Annulus Geometries
by Dayang Wen, Junduo Wang, Qi Song, Rui Xu, Zixin Guo and Fushen Liu
Mathematics 2026, 14(8), 1362; https://doi.org/10.3390/math14081362 - 18 Apr 2026
Viewed by 319
Abstract
Two-phase displacement between cement slurry and drilling fluid in wellbore systems is inherently nonlinear, interface-dominated, and strongly affected by geometric confinement, posing substantial challenges to efficient and stable numerical simulation. Conventional CFD approaches rely on mesh discretization and explicit interface tracking, which become [...] Read more.
Two-phase displacement between cement slurry and drilling fluid in wellbore systems is inherently nonlinear, interface-dominated, and strongly affected by geometric confinement, posing substantial challenges to efficient and stable numerical simulation. Conventional CFD approaches rely on mesh discretization and explicit interface tracking, which become computationally demanding and sensitive to grid quality in complex geometries and convection-dominated regimes. To address these limitations, this study develops a unified physics-informed neural network (PINN) framework for directly solving the coupled incompressible Navier–Stokes and Volume of Fluid (VOF) equations governing pressure-driven displacement. The framework is first validated against canonical transient flows and then applied to two-phase displacement in parallel-plate channels, semicircular bends, and a casing–annulus geometry representative of well cementing operations. The predicted velocity, pressure, and volume fraction fields exhibit strong agreement with ANSYS Fluent (2024R1) results, with relative errors generally around 5%, thereby demonstrating physical consistency and numerical stability without mesh generation or pressure–velocity splitting, while also showing favorable computational efficiency for the cases considered. Sensitivity analyses demonstrate that a smoother casing-shoe geometry significantly enhances PINN convergence, while higher Péclet numbers deteriorate training stability by increasing convection-dominated stiffness and optimization difficulty. The results demonstrate that the proposed PINN framework, with its mesh-free and geometrically flexible characteristics, is a promising approach for modeling multiphase displacement in cementing applications. Full article
(This article belongs to the Special Issue New Advances in Physics-Informed Machine Learning)
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