An introduction to operator preconditioning for the fast iterative integral equation solution of time-harmonic scattering problems

X Antoine, M Darbas - Multiscale Science and Engineering, 2021 - Springer
The aim of this paper is to provide an introduction to the improved iterative Krylov solution of
boundary integral equations for time-harmonic scattering problems arising in acoustics …

An application of the boundary element method (BEM) to the calculation of the single-scattering properties of very complex ice crystals in the microwave and sub …

A Kleanthous, AJ Baran, T Betcke, DP Hewett… - Journal of Quantitative …, 2024 - Elsevier
To improve the prediction of weather and climate models there is a need for the accurate
computation of the single-scattering properties of randomly oriented complex atmospheric …

[HTML][HTML] Retrieval of terahertz ice cloud properties from airborne measurements based on the irregularly shaped Voronoi ice scattering models

M Li, H Letu, H Ishimoto, S Li, L Liu… - Atmospheric …, 2023 - amt.copernicus.org
Currently, terahertz remote sensing technology is one of the best ways to detect the
microphysical properties of ice clouds. Influenced by the representativeness of the ice crystal …

A fast converging resonance-free global multi-trace method for scattering by partially coated composite structures

S Lasisi, TM Benson, G Gradoni… - … on Antennas and …, 2022 - ieeexplore.ieee.org
Global and local multitrace formulations (MTFs) provide a flexible and efficient method for
the modeling of scattering and transmission of time harmonic electromagnetic (EM) waves …

Toward better constrained scattering models for natural ice crystals in the visible region

G Xu, F Waitz, S Wagner, F Nehlert… - Journal of …, 2023 - Wiley Online Library
In this work, we introduce a method for constraining the optical scattering models of natural
ice crystals based on in‐situ measurements. Specifically the measured angular scattering …

[HTML][HTML] The first microwave and submillimetre closure study using particle models of oriented ice hydrometeors to simulate polarimetric measurements of ice clouds

K McCusker, AJ Baran, C Westbrook… - Atmospheric …, 2024 - amt.copernicus.org
The first closure study involving passive microwave and submillimetre measurements of ice
clouds with the consideration of oriented particles is presented, using a unique combination …

Shape Uncertainty Quantification for Electromagnetic Wave Scattering via First-Order Sparse Boundary Element Approximation

P Escapil-Inchauspé… - IEEE Transactions on …, 2024 - ieeexplore.ieee.org
Quantifying the effects on electromagnetic waves scattered by objects of uncertain shape is
key for robust design, particularly in high-precision applications. Assuming small random …

Bi-parametric operator preconditioning

P Escapil-Inchauspé, C Jerez-Hanckes - Computers & Mathematics with …, 2021 - Elsevier
We extend the operator preconditioning framework Hiptmair (2006)[10] to Petrov-Galerkin
methods while accounting for parameter-dependent perturbations of both variational forms …

Local multiple traces formulation for electromagnetics: Stability and preconditioning for smooth geometries

A Ayala, X Claeys, P Escapil-Inchauspé… - … of Computational and …, 2022 - Elsevier
We consider the time-harmonic electromagnetic transmission problem for the unit sphere.
Appealing to a vector spherical harmonics analysis, we prove the first stability result of the …

Accelerated Calderón preconditioning for electromagnetic scattering by multiple absorbing dielectric objects

A Kleanthous - 2021 - discovery.ucl.ac.uk
We consider electromagnetic scattering by multiple absorbing dielectric objects using the
PMCHWT boundary integral equation formulation. Galerkin discretisation of this formulation …