arXiv:2512.16305physics.flu-dyncs.LG2025-12被引 1

Transformer在数据缺失时仍能准确模拟历史依赖流体,优于传统物理模型。

Can Transformers overcome the lack of data in the simulation of history-dependent flows?

  • 用Transformer直接学习缺失变量的历史依赖关系
  • 在低维隐空间下误差低于物理约束神经网络
  • 适合数据不全但需建模历史效应的复杂流体系统

已知某些动态系统因关键变量缺失导致历史依赖性(非马尔可夫性)和噪声。传统方法通过引入难以实验测量的表观变量(如流体中的构象张量)弥补缺陷。本文研究Transformer架构在这些变量缺失情况下的表现。评估基于三个基准问题:无历史依赖的圆柱绕流、基于Oldroyd-B模型的粘弹性库埃特流,以及采用FENE模型描述的非线性聚合物流体。结果表明,在实验数据缺失场景下,Transformer优于具有热力学一致性与度量偏置的结构保持型神经网络,即使在低维隐空间中也表现出更低误差;而在状态变量可完全观测的系统中,热力学模型性能更优。

原文摘要 · Abstract (English)

It is well known that the lack of information about certain variables necessary for the description of a dynamical system leads to the introduction of historical dependence (lack of Markovian character of the model) and noise. Traditionally, scientists have made up for these shortcomings by designing phenomenological variables that take into account this historical dependence (typically, conformational tensors in fluids). Often, these phenomenological variables are not easily measurable experimentally. In this work, we study to what extent Transformer architectures are able to cope with the lack of experimental data on these variables. The methodology is evaluated on three benchmark problems: a cylinder flow with no history dependence, a viscoelastic Couette flow modeled via the Oldroyd-B formalism, and a non-linear polymeric fluid described by the FENE model. Our results show that the Transformer outperforms a thermodynamically consistent, structure-preserving neural network with metriplectic bias in systems with missing experimental data, providing lower errors even in low-dimensional latent spaces. In contrast, for systems whose state variables can be fully known, the metriplectic model achieves superior performance.

流体模拟Transformer历史依赖数据缺失

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