Zobrazeno 1 - 10
of 299
pro vyhledávání: '"Iliescu, Traian"'
Autor:
Ballarin, Francesco, Iliescu, Traian
Galerkin reduced order models (ROMs), e.g., based on proper orthogonal decomposition (POD) or reduced basis methods, have achieved significant success in the numerical simulation of fluid flows. The ROM numerical analysis, however, is still being dev
Externí odkaz:
http://arxiv.org/abs/2409.00621
Reduced order models (ROMs) have achieved a lot of success in reducing the computational cost of traditional numerical methods across many disciplines. For convection-dominated (e.g., turbulent) flows, however, standard ROMs generally yield inaccurat
Externí odkaz:
http://arxiv.org/abs/2407.00231
Reg-ROMs are stabilization strategies that leverage spatial filtering to alleviate the spurious numerical oscillations generally displayed by the classical G-ROM in under-resolved numerical simulations of turbulent flows. In this paper, we propose a
Externí odkaz:
http://arxiv.org/abs/2312.13272
Publikováno v:
Finite Elements in Analysis and Design, Volume 226, 15 November 2023, 104021
In this paper, we propose a novel ROM stabilization strategy for under-resolved convection-dominated flows, the approximate deconvolution Leray ROM (ADL-ROM). The new ADL-ROM introduces AD as a new means to increase the accuracy of the classical Lera
Externí odkaz:
http://arxiv.org/abs/2307.10817
We propose, analyze, and investigate numerically a novel feedback control strategy for high Reynolds number flows. For both the continuous and the discrete (finite element) settings, we prove that the new strategy yields accurate results for high Rey
Externí odkaz:
http://arxiv.org/abs/2307.00675
Galerkin and Petrov-Galerkin projection-based reduced-order models (ROMs) of transient partial differential equations are typically obtained by performing a dimension reduction and projection process that is defined at either the spatially continuous
Externí odkaz:
http://arxiv.org/abs/2302.09355
We propose, analyze, and investigate numerically a novel two-level Galerkin reduced order model (2L-ROM) for the efficient and accurate numerical simulation of the steady Navier-Stokes equations. In the first step of the 2L-ROM, a relatively low-dime
Externí odkaz:
http://arxiv.org/abs/2211.12968
In this paper, we propose a novel reduced order model (ROM) lengthscale that is constructed by using energy distribution arguments. The new energy-based ROM lengthscale is fundamentally different from the current ROM lengthscales, which are built by
Externí odkaz:
http://arxiv.org/abs/2211.04404
Trajectory-wise data-driven reduced order models (ROMs) tend to be sensitive to training data, and thus lack robustness. We propose to construct a robust stochastic ROM closure (S-ROM) from data consisting of multiple trajectories from random initial
Externí odkaz:
http://arxiv.org/abs/2209.02739
In this paper, we investigate the modeling of sub-scale components of proper orthogonal decomposition reduced order models (POD-ROMs) of convection-dominated flows. We propose ROM closure models that depend on the ROM residual. We illustrate the new
Externí odkaz:
http://arxiv.org/abs/2208.00059