Predictive Limitations of Physics-Informed Neural Networks in Vortex Shedding

1 code implementation • 31 May 2023 • Pi-Yueh Chuang, Lorena A. Barba

We look at the flow around a 2D cylinder and find that data-free PINNs are unable to predict vortex shedding.

Experience report of physics-informed neural networks in fluid simulations: pitfalls and frustration

no code implementations • 27 May 2022 • Pi-Yueh Chuang, Lorena A. Barba

This report presents our not-so-successful experiments of solving the Navier-Stokes equations with PINN as a replacement for traditional solvers.

Reproducible Workflow on a Public Cloud for Computational Fluid Dynamics

1 code implementation • 16 Apr 2019 • Olivier Mesnard, Lorena A. Barba

Finally, we share with the community what we have learned from nearly two years of using Azure cloud to enhance transparency and reproducibility in our computational simulations.

Computational Engineering, Finance, and Science Computational Physics

Computational nanoplasmonics for biosensing applications using PyGBe-LSPR

1 code implementation • 27 Dec 2018 • Natalia C. Clementi, Christopher D. Cooper, Lorena A. Barba

For a model of a sensor-analyte system, consisting of a spherical silver nanoparticle and a set of bovine serum albumin (BSA) proteins, our results again obtain grid convergence as 1/N (with respect to the Richardson extrapolated value).

Computational Physics Biological Physics

Journal of Open Source Software (JOSS): design and first-year review

1 code implementation • 7 Jul 2017 • Arfon M. Smith, Kyle E. Niemeyer, Daniel S. Katz, Lorena A. Barba, George Githinji, Melissa Gymrek, Kathryn D Huff, Christopher R. Madan, Abigail Cabunoc Mayes, Kevin M Moerman, Pjotr Prins, Karthik Ram, Ariel Rokem, Tracy K. Teal, Roman Valls Guimera, Jacob T. VanderPlas

JOSS is a free and open-access journal that publishes articles describing research software.

Digital Libraries Software Engineering

Reproducible and replicable CFD: it's harder than you think

3 code implementations • 13 May 2016 • Olivier Mesnard, Lorena A. Barba

Completing a full replication study of our previously published findings on bluff-body aerodynamics was harder than we thought.

Computational Physics

Inexact Krylov iterations and relaxation strategies with fast-multipole boundary element method

2 code implementations • 19 Jun 2015 • Tingyu Wang, Simon K. Layton, Lorena A. Barba

We take advantage of a unique property of Krylov iterations that allow lower accuracy of the matrix-vector products as convergence proceeds, and propose a relaxation strategy based on progressively decreasing $p$.

Numerical Analysis Computational Physics 35Q35, 35Q99, 45B05, 76D07, 76Z99

Poisson-Boltzmann model for protein-surface electrostatic interactions and grid-convergence study using the PyGBe code

3 code implementations • 11 Jun 2015 • Christopher D. Cooper, Lorena A. Barba

This paper develops and evaluates a computational model to study electrostatic interactions of proteins and charged nanosurfaces, via the Poisson-Boltzmann equation.

Computational Physics

cuIBM -- A GPU-accelerated Immersed Boundary Method

1 code implementation • 16 Sep 2011 • Simon K. Layton, Anush Krishnan, Lorena A. Barba

A projection-based immersed boundary method is dominated by sparse linear algebra routines.

Computational Engineering, Finance, and Science