HybriNet-Hybrid Neural Network-based framework for Multi-Parametric Database Generation, Enhancement, and Forecasting

Abstract: In this work, we introduce HybriNet an innovative and robust framework capable of enhancing spatial resolution, generating fluid dynamics databases for specific flow parameters, and predicting their temporal evolution. The methodology is based on the development of a reduced-order model (ROM) by integrating high-order singular value decomposition (HOSVD) with ML and deep learning (DL) techniques. The ROM enables the generation of multi-parametric fluid dynamics databases concerning varying flow conditions, increases the spatial resolution, and predicts the behaviour of the fluid dynamics problem in terms of time. This helps to accelerate numerical simulations and generate new data efficiently. The performance of the proposed approach has been validated using a collection of 30 two-dimensional laminar flow simulations over a square cylinder at different Reynolds numbers and angles of attack. The databases reconstructed using the proposed methodology exhibited a relative root mean square error below 2% when compared to ground-truth high-resolution data, demonstrating the robustness, accuracy, and efficiency of the proposed framework.