FlowBERT: Prompt-tuned BERT for variable flow field prediction
This work addresses rapid fluid dynamics prediction for engineering applications like aerodynamic optimization and flow control, representing a novel paradigm rather than an incremental improvement.
This study tackled the high computational costs of traditional computational fluid dynamics methods and limited cross-condition transfer of deep learning models by proposing FlowBERT, a universal flow field prediction framework based on knowledge transfer from large language models, which reduces prediction time from hours to seconds while maintaining over 90% accuracy and outperforms conventional Transformer models in few-shot learning with exceptional generalization across conditions.
This study proposes a universal flow field prediction framework based on knowledge transfer from large language model (LLM), addressing the high computational costs of traditional computational fluid dynamics (CFD) methods and the limited cross-condition transfer capability of existing deep learning models. The framework innovatively integrates Proper Orthogonal Decomposition (POD) dimensionality reduction with fine-tuning strategies for pretrained LLM, where POD facilitates compressed representation of flow field features while the fine-tuned model learns to encode system dynamics in state space. To enhance the model's adaptability to flow field data, we specifically designed fluid dynamics-oriented text templates that improve predictive performance through enriched contextual semantic information. Experimental results demonstrate that our framework outperforms conventional Transformer models in few-shot learning scenarios while exhibiting exceptional generalization across various inflow conditions and airfoil geometries. Ablation studies reveal the contributions of key components in the FlowBERT architecture. Compared to traditional Navier-Stokes equation solvers requiring hours of computation, our approach reduces prediction time to seconds while maintaining over 90% accuracy. The developed knowledge transfer paradigm establishes a new direction for rapid fluid dynamics prediction, with potential applications extending to aerodynamic optimization, flow control, and other engineering domains.