2018

Learning Parameters and Constitutive Relationships with Physics Informed Deep Neural Networks

Tartakovsky, Alexandre M., Marrero, Carlos Ortiz, Perdikaris, Paris et al.

Understand

We present a physics informed deep neural network (DNN) method for estimating parameters and unknown physics (constitutive relationships) in partial differential equation (PDE) models.

  • We use PDEs in addition to measurements to train DNNs to approximate unknown parameters and constitutive relationships as well as states.
  • The proposed approach increases the accuracy of DNN approximations of partially known functions when a limited number of measurements is available and allows for training DNNs when no direct measurements of the functions of interest are available.
  • We employ physics informed DNNs to estimate the unknown space-dependent diffusion coefficient in a linear diffusion equation and an unknown constitutive relationship in a non-linear diffusion equation.

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