Learning physical models that can respect conservation laws

D Hansen, DC Maddix, S Alizadeh… - International …, 2023 - proceedings.mlr.press
Recent work in scientific machine learning (SciML) has focused on incorporating partial
differential equation (PDE) information into the learning process. Much of this work has …

Regularization errors introduced by the one-fluid formulation in the solution of two-phase elliptic problems

D Fuster, Y Mimoh - Journal of Computational Physics, 2024 - Elsevier
This manuscript discusses the structure of the errors in the solution of elliptic problems
introduced by the regularization of the fluid properties discontinuity in a small region of finite …

Using Uncertainty Quantification to Characterize and Improve Out-of-Domain Learning for PDEs

SC Mouli, DC Maddix, S Alizadeh, G Gupta… - arXiv preprint arXiv …, 2024 - arxiv.org
Existing work in scientific machine learning (SciML) has shown that data-driven learning of
solution operators can provide a fast approximate alternative to classical numerical partial …

Validation suite for numerical solvers calculating effective thermal conductivity in porous media

M Siegert, M Gurris, EH Saenger - Journal of Applied Geophysics, 2021 - Elsevier
A validation suite for numerical solvers calculating effective thermal conductivity in porous
media is presented. In a first step an appropriate numerical solver based on the finite volume …

Numerical artifacts in the discontinuous Generalized Porous Medium Equation: How to avoid spurious temporal oscillations

DC Maddix, L Sampaio, M Gerritsen - Journal of Computational Physics, 2018 - Elsevier
Numerical discretizations of the Generalized Porous Medium Equation (GPME) with
discontinuous coefficients are analyzed with respect to the formation of numerical artifacts. In …

A preliminary assessment of the sensitivity of uniaxially driven fusion targets to flux-limited thermal conduction modeling

DA Chapman, JD Pecover, N Chaturvedi… - Physics of …, 2021 - pubs.aip.org
The role of flux-limited thermal conduction on the fusion performance of the uniaxially driven
targets studied by Derentowicz et al.[J. Tech. Phys. 18, 465 (1977) and J. Tech. Phys. 25 …

[PDF][PDF] A vertex-centered and positivity-preserving finite volume scheme for two-dimensional three-temperature radiation diffusion equations on general polygonal …

S Su, J Wu - Numerical Mathematics: Theory, Methods and …, 2020 - global-sci.com
Two-dimensional three-temperature (2-D 3-T) radiation diffusion equations are widely used
to approximately describe the evolution of radiation energy within a multimaterial system …

[PDF][PDF] A decoupled and positivity-preserving DDFV scheme for diffusion problems on polyhedral meshes

Q Dong, S Su, J Wu - CiCP, 2020 - scholar.archive.org
We propose a decoupled and positivity-preserving discrete duality finite volume (DDFV)
scheme for anisotropic diffusion problems on polyhedral meshes with star-shaped cells and …

Numerical determination of pressure‐dependent effective thermal conductivity in Berea sandstone

M Siegert, M Gurris, C Finger, EH Saenger - Geophysical Prospecting, 2021 - earthdoc.org
In this paper, the methods of digital rock physics are applied to determine pressure‐
dependent effective thermal conductivity in rock samples. Simulations are performed with an …

[HTML][HTML] Using uncertainty quantification to characterize and improve out-of-domain learning for PDEs

SC Mouli, DM Robinson, S Alizadeh, G Gupta, A Stuart… - 2024 - amazon.science
Existing work in scientific machine learning (SciML) has shown that data-driven learning of
solution operators can provide a fast approximate alternative to classical numerical partial …