Finite determining parameters feedback control for distributed nonlinear dissipative systems-a computational study

E Lunasin, ES Titi - arxiv preprint arxiv:1506.03709, 2015 - arxiv.org
We present a computational study of a simple finite-dimensional feedback control algorithm
for stabilizing solutions of infinite-dimensional dissipative evolution equations such as …

Parameter recovery for the 2 dimensional Navier--Stokes equations via continuous data assimilation

E Carlson, J Hudson, A Larios - SIAM Journal on Scientific Computing, 2020 - SIAM
We study a continuous data assimilation algorithm proposed by Azouani, Olson, and Titi
(AOT) in the context of an unknown viscosity. We determine the large-time error between the …

Dynamically learning the parameters of a chaotic system using partial observations

E Carlson, J Hudson, A Larios, VR Martinez… - arxiv preprint arxiv …, 2021 - arxiv.org
Motivated by recent progress in data assimilation, we develop an algorithm to dynamically
learn the parameters of a chaotic system from partial observations. Under reasonable …

Reconstructing Rayleigh–Bénard flows out of temperature-only measurements using physics-informed neural networks

P Clark Di Leoni, L Agasthya, M Buzzicotti… - The European Physical …, 2023 - Springer
We investigate the capabilities of Physics-Informed Neural Networks (PINNs) to reconstruct
turbulent Rayleigh–Bénard flows using only temperature information. We perform a …

A data assimilation algorithm for the subcritical surface quasi-geostrophic equation

MS Jolly, VR Martinez, ES Titi - Advanced Nonlinear Studies, 2017 - degruyter.com
In this article, we prove that data assimilation by feedback nudging can be achieved for the
three-dimensional quasi-geostrophic equation in a simplified scenario using only large …

Global in time stability and accuracy of IMEX-FEM data assimilation schemes for Navier–Stokes equations

A Larios, LG Rebholz, C Zerfas - Computer Methods in Applied Mechanics …, 2019 - Elsevier
We study numerical schemes for incompressible Navier–Stokes equations using IMEX
temporal discretizations, finite element spatial discretizations, and equipped with continuous …

Identifying the body force from partial observations of a two-dimensional incompressible velocity field

A Farhat, A Larios, VR Martinez, JP Whitehead - Physical Review Fluids, 2024 - APS
Using limited observations of the velocity field of the two-dimensional Navier-Stokes
equations, we successfully reconstruct the steady body force that drives the flow. The …

Concurrent MultiParameter Learning Demonstrated on the Kuramoto--Sivashinsky Equation

B Pachev, JP Whitehead, SA McQuarrie - SIAM Journal on Scientific …, 2022 - SIAM
We develop an algorithm based on the nudging data assimilation scheme for the concurrent
(on-the-fly) estimation of scalar parameters for a system of evolutionary dissipative partial …

Convergence analysis of a viscosity parameter recovery algorithm for the 2D Navier–Stokes equations

VR Martinez - Nonlinearity, 2022 - iopscience.iop.org
In this paper, the convergence of an algorithm for recovering the unknown kinematic
viscosity of a two-dimensional incompressible, viscous fluid is studied. The algorithm of …

Efficient dynamical downscaling of general circulation models using continuous data assimilation

S Desamsetti, HP Dasari, S Langodan… - Quarterly Journal of …, 2019 - Wiley Online Library
Continuous data assimilation (CDA) is successfully implemented for the first time for efficient
dynamical downscaling of a global atmospheric reanalysis. A comparison of the …