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Multifidelity deep operator networks for data-driven and physics-informed problems

Journal Article · · Journal of Computational Physics
 [1];  [2];  [3];  [1]
  1. Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  3. Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Brown Univ., Providence, RI (United States)
Operator learning for complex nonlinear systems is increasingly common in modeling multi-physics and multi-scale systems. However, training such high-dimensional operators requires a large amount of expensive, high-fidelity data, either from experiments or simulations. In this work, we present a composite Deep Operator Network (DeepONet) for learning using two datasets with different levels of fidelity to accurately learn complex operators when sufficient high-fidelity data is not available. Additionally, we demonstrate that the presence of low-fidelity data can improve the predictions of physics-informed learning with DeepONets. We demonstrate the new multi-fidelity training in diverse examples, including modeling of the ice-sheet dynamics of the Humboldt glacier, Greenland, using two different fidelity models and also using the same physical model at two different resolutions.
Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR). Scientific Discovery through Advanced Computing (SciDAC)
Grant/Contract Number:
AC05-76RL01830; NA0003525
OSTI ID:
2008415
Alternate ID(s):
OSTI ID: 2369182
Report Number(s):
PNNL-SA--172145
Journal Information:
Journal of Computational Physics, Journal Name: Journal of Computational Physics Vol. 493; ISSN 0021-9991
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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