Consistency of the full and reduced order models for evolve‐filter‐relax regularization of convection‐dominated, marginally‐resolved flows

M Strazzullo, M Girfoglio, F Ballarin… - International Journal …, 2022 - Wiley Online Library
Numerical stabilization is often used to eliminate (alleviate) the spurious oscillations
generally produced by full order models (FOMs) in under‐resolved or marginally‐resolved …

An efficient and modular grad–div stabilization

JA Fiordilino, W Layton, Y Rong - Computer Methods in Applied Mechanics …, 2018 - Elsevier
This paper presents two modular grad–div algorithms for calculating solutions to the Navier–
Stokes equations (NSE). These algorithms add to an NSE code a minimally intrusive module …

A modular grad-div stabilization for the 2D/3D nonstationary incompressible magnetohydrodynamic equations

X Lu, P Huang - Journal of Scientific Computing, 2020 - Springer
In this paper, we study an efficient and modular grad-div stabilization algorithm for the 2D/3D
nonstationary incompressible magnetohydrodynamic equations. The considered algorithm …

A second order partitioned method with grad-div stabilization for the non-stationary dual-porosity-Stokes model

Y Li, D Xue, Y Rong, Y Qin - Computers & Mathematics with Applications, 2022 - Elsevier
This paper proposes, analyzes and tests a second-order time-accurate partitioned method
for the coupling dual-porosity-Stokes equations. The algorithm combines a backward …

A two-level finite element method with grad-div stabilizations for the incompressible Navier–Stokes equations

Y Shang - Journal of Computational and Applied Mathematics, 2024 - Elsevier
This article presents and studies a two-level grad-div stabilized finite element discretization
method for solving numerically the steady incompressible Navier–Stokes equations. The …

Three-dimensional shear driven turbulence with noise at the boundary

WTL Fan, M Jolly, A Pakzad - Nonlinearity, 2021 - iopscience.iop.org
We consider the incompressible 3D Navier–Stokes equations subject to a shear induced by
noisy movement of part of the boundary. The effect of the noise is quantified by upper …

Variational Multiscale Evolve and Filter Strategies for Convection-Dominated Flows

M Strazzullo, F Ballarin, T Iliescu… - arXiv preprint arXiv …, 2024 - arxiv.org
The evolve-filter (EF) model is a filter-based numerical stabilization for under-resolved
convection-dominated flows. EF is a simple, modular, and effective strategy for both full …

On the long time behavior of time relaxation model of fluids

A Pakzad - Physica D: Nonlinear Phenomena, 2020 - Elsevier
The rate of energy dissipation of the time relaxation model in body-force-driven turbulence is
analyzed to evaluate the effect of a time relaxation term on a simulation of 3 d fluid motion …

On the zeroth law of turbulence for the stochastically forced Navier-Stokes equations

YT Chow, A Pakzad - arXiv preprint arXiv:2004.08655, 2020 - arxiv.org
We consider three-dimensional stochastically forced Navier-Stokes equations subjected to
white-in-time (colored-in-space) forcing in the absence of boundaries. Upper and lower …

[HTML][HTML] Analysis of mesh effects on turbulent flow statistics

A Pakzad - Journal of Mathematical Analysis and Applications, 2019 - Elsevier
Turbulence models, such as the Smagorinsky model herein, are used to represent the
energy lost from resolved to under-resolved scales due to the energy cascade (ie non …