Data-driven reduced order model with temporal convolutional neural network

Pin Wu*, Junwu Sun, Xuting Chang, Wenjie Zhang, Rossella Arcucci, Yi-Ke GUO, Christopher C. Pain

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

This paper presents a novel model reduction method based on proper orthogonal decomposition and temporal convolutional neural network. The method generates basis functions of the flow field by proper orthogonal decomposition, and the coefficients are taken as the low-dimensional features. Temporal convolutional neural network is used to construct the model for predicting low-dimensional features. In this work, the training data are obtained from high fidelity numerical simulation. Compared with recurrent networks, temporal convolutional neural network is more effective with fewer parameters. The model reduction method developed here depends only on the solution of flow field. The performance of the new reduced order model is evaluated using numerical case: flow past a cylinder. Experimental results illustrate that time cost is reduced by three orders of magnitude, and convolutional architecture is beneficial to construct reduced order model. The speed-up ratio is linear with the computational scale of the numerical simulation.

Original languageEnglish
Article number112766
JournalComputer Methods in Applied Mechanics and Engineering
Volume360
DOIs
Publication statusPublished - 1 Mar 2020

Scopus Subject Areas

  • Computational Mechanics
  • Mechanics of Materials
  • Mechanical Engineering
  • Physics and Astronomy(all)
  • Computer Science Applications

User-Defined Keywords

  • Deep learning
  • Proper orthogonal decomposition
  • Reduced order model
  • Temporal convolutional network

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