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Title: Multifidelity computing for coupling full and reduced order models

Journal Article · · PLoS ONE
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1];  [2];  [3]
  1. Oklahoma State Univ., Stillwater, OK (United States). School of Mechanical & Aerospace Engineering
  2. Univ. of Tulsa, Tulsa, OK (United States). The McDougall School of Petroleum Engineering
  3. Norwegian Univ. of Science and Technology, Trondheim (Norway). Dept. of Engineering Cybernetics; SINTEF Digital, Trondheim (Norway). Dept. of Mathematics and Cybernetics

Hybrid physics-machine learning models are increasingly being used in simulations of transport processes. Many complex multiphysics systems relevant to scientific and engineering applications include multiple spatiotemporal scales and comprise a multifidelity problem sharing an interface between various formulations or heterogeneous computational entities. To this end, we present a robust hybrid analysis and modeling approach combining a physics-based full order model (FOM) and a data-driven reduced order model (ROM) to form the building blocks of an integrated approach among mixed fidelity descriptions toward predictive digital twin technologies. At the interface, we introduce a long short-term memory network to bridge these high and low-fidelity models in various forms of interfacial error correction or prolongation. The proposed interface learning approaches are tested as a new way to address ROM-FOM coupling problems solving nonlinear advection-diffusion flow situations with a bifidelity setup that captures the essence of a broad class of transport processes.

Sponsoring Organization:
USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR); Norwegian Research Council
Grant/Contract Number:
SC0019290; 268044/E20
OSTI ID:
1816456
Journal Information:
PLoS ONE, Vol. 16, Issue 2; ISSN 1932-6203
Publisher:
Public Library of ScienceCopyright Statement
Country of Publication:
United States
Language:
English

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