L-Sweeps: A scalable, parallel preconditioner for the high-frequency Helmholtz equation

M Taus, L Zepeda-Núñez, RJ Hewett… - Journal of Computational …, 2020 - Elsevier
We present the first fast solver for the high-frequency Helmholtz equation that scales
optimally in parallel for a single right-hand side. The L-sweeps approach achieves this …

Wavenumber-explicit stability and convergence analysis of hp finite element discretizations of Helmholtz problems in piecewise smooth media

M Bernkopf, T Chaumont-Frelet, JM Melenk - arXiv preprint arXiv …, 2022 - arxiv.org
We present a wavenumber-explicit convergence analysis of the hp finite element method
applied to a class of heterogeneous Helmholtz problems with piecewise analytic coefficients …

Phase-informed discontinuous Galerkin method for extremely high-frequency wave modeling

H Feng, J Huang, C Li, K Liu, YY Wang… - … on Antennas and …, 2024 - ieeexplore.ieee.org
Two long-standing problems exist in the high-frequency electromagnetic scattering analysis:
1) full-wave methods suffer a geometric increase in computational costs, along with the …

On the derivation of guaranteed and p-robust a posteriori error estimates for the Helmholtz equation

T Chaumont-Frelet, A Ern, M Vohralík - Numerische Mathematik, 2021 - Springer
We propose a novel a posteriori error estimator for conforming finite element discretizations
of two-and three-dimensional Helmholtz problems. The estimator is based on an …

An Edge Multiscale Interior Penalty Discontinuous Galerkin method for heterogeneous Helmholtz problems with large varying wavenumber

S Fu, ET Chung, G Li - Journal of Computational Physics, 2021 - Elsevier
Abstract We propose an Edge Multiscale Finite Element Method (EMsFEM) based on an
Interior Penalty Discontinuous Galerkin (IPDG) formulation for the heterogeneous Helmholtz …

The (,)-HDG Method for the Helmholtz Equation with Large Wave Number

B Zhu, H Wu - SIAM Journal on Numerical Analysis, 2024 - SIAM
In this paper, we analyze a hybridizable discontinuous Galerkin method for the Helmholtz
equation with large wave number, which uses piecewise polynomials of degree of to …

Wavenumber-explicit stability and convergence analysis of ℎ𝑝 finite element discretizations of Helmholtz problems in piecewise smooth media

M Bernkopf, T Chaumont-Frelet, J Melenk - Mathematics of Computation, 2024 - ams.org
We present a wavenumber-explicit convergence analysis of the $ hp $ Finite Element
Method applied to a class of heterogeneous Helmholtz problems with piecewise analytic …

[HTML][HTML] Adaptive finite element method for the sound wave problems in two kinds of media

H Wang, W Yang, Y Huang - Computers & Mathematics with Applications, 2020 - Elsevier
In this paper, we consider the adaptive finite element method for sound wave propagation
problems in two kinds of media, which are the linear anisotropic acoustic materials (the …

Frequency-explicit approximability estimates for time-harmonic Maxwell's equations

T Chaumont-Frelet, P Vega - Calcolo, 2022 - Springer
We consider time-harmonic Maxwell's equations set in a heterogeneous medium with
perfectly conducting boundary conditions. Given a divergence-free right-hand side lying in L …