Modeling the fluctuations of groundwater level by employing ensemble deep learning techniques

HA Afan, A Ibrahem Ahmed Osman… - Engineering …, 2021 - Taylor & Francis
This study proposes two techniques: Deep Learning (DL) and Ensemble Deep Learning
(EDL) to predict groundwater level (GWL) for five wells in Malaysia. Two scenarios were …

Multi-fidelity Bayesian optimization to solve the inverse Stefan problem

JM Winter, R Abaidi, JWJ Kaiser, S Adami… - Computer Methods in …, 2023 - Elsevier
In this work, we propose an efficient solution of the inverse Stefan problem by multi-fidelity
Bayesian optimization. We construct a multi-fidelity Gaussian process surrogate model by …

Machine-learning energy-preserving nonlocal closures for turbulent fluid flows and inertial tracers

ATG Charalampopoulos, TP Sapsis - Physical Review Fluids, 2022 - APS
We formulate a data-driven, physics-constrained closure method for coarse-scale numerical
simulations of turbulent fluid flows. Our approach involves a closure scheme that is nonlocal …

MFC: An open-source high-order multi-component, multi-phase, and multi-scale compressible flow solver

SH Bryngelson, K Schmidmayer, V Coralic… - Computer Physics …, 2021 - Elsevier
MFC is an open-source tool for solving multi-component, multi-phase, and bubbly
compressible flows. It is capable of efficiently solving a wide range of flows, including droplet …

Solving the population balance equation for non-inertial particles dynamics using probability density function and neural networks: Application to a sooting flame

A Seltz, P Domingo, L Vervisch - Physics of Fluids, 2021 - pubs.aip.org
Numerical modeling of non-inertial particles dynamics is usually addressed by solving a
population balance equation (PBE). In addition to space and time, a discretization is …

[HTML][HTML] Uncertainty quantification of turbulent systems via physically consistent and data-informed reduced-order models

A Charalampopoulos, T Sapsis - Physics of Fluids, 2022 - pubs.aip.org
This work presents a data-driven, energy-conserving closure method for the coarse-scale
evolution of the mean and covariance of turbulent systems. Spatiotemporally non-local …

[HTML][HTML] SPARSE–R: A point-cloud tracer with random forcing

D Domínguez-Vázquez, GB Jacobs - International Journal of Multiphase …, 2024 - Elsevier
A predictive, point-cloud tracer is presented that determines with a quantified uncertainty the
Lagrangian motion of a group of point-particles within a finite region. The tracer assumes a …

Hybrid quadrature moment method for accurate and stable representation of non-Gaussian processes applied to bubble dynamics

A Charalampopoulos… - … of the Royal …, 2022 - royalsocietypublishing.org
Solving the population balance equation (PBE) for the dynamics of a dispersed phase
coupled to a continuous fluid is expensive. Still, one can reduce the cost by representing the …

Conditional moment methods for polydisperse cavitating flows

SH Bryngelson, RO Fox, T Colonius - Journal of Computational Physics, 2023 - Elsevier
The dynamics of cavitation bubbles are important in many flows, but their small sizes and
high number densities often preclude direct numerical simulation. We present a …

Liouville models of particle-laden flow

D Domínguez-Vázquez, GB Jacobs… - Physics of Fluids, 2024 - pubs.aip.org
Langevin (stochastic differential) equations are routinely used to describe particle-laden
flows. They predict Gaussian probability density functions (PDFs) of a particle's trajectory …