Convolution quadrature for the wave equation with impedance boundary conditions

SA Sauter, M Schanz - Journal of Computational Physics, 2017 - Elsevier
We consider the numerical solution of the wave equation with impedance boundary
conditions and start from a boundary integral formulation for its discretization. We develop …

The domain derivative in inverse obstacle scattering with nonlinear impedance boundary condition

L Fink, F Hettlich - Inverse Problems, 2023 - iopscience.iop.org
In this paper an inverse obstacle scattering problem for the Helmholtz equation with
nonlinear impedance boundary condition is considered. For a certain class of nonlinearities …

Time domain boundary elements for dynamic contact problems

H Gimperlein, F Meyer, C Özdemir… - Computer Methods in …, 2018 - Elsevier
This article considers a unilateral contact problem for the wave equation. The problem is
reduced to a variational inequality for the Dirichlet-to-Neumann operator for the wave …

An overview on a time discrete convolution—space collocation BEM for 2D exterior wave propagation problems

S Falletta, G Monegato, L Scuderi - ANNALI DELL'UNIVERSITA'DI …, 2022 - Springer
We consider 2D transient linear wave propagation problems defined in the exterior of
bounded domains. In particular, we first consider the problem represented by the classical …

A probabilistic scheme for semilinear nonlocal diffusion equations with volume constraints

M Yang, G Zhang, D Del-Castillo-Negrete… - SIAM Journal on Numerical …, 2023 - SIAM
This work presents a probabilistic scheme for solving semilinear nonlocal diffusion
equations with volume constraints and integrable kernels. The nonlocal model of interest is …

Time-dependent electromagnetic scattering from dispersive materials

J Nick, S Burkhard, C Lubich - IMA Journal of Numerical …, 2024 - academic.oup.com
This paper studies time-dependent electromagnetic scattering from obstacles that are
described by dispersive material laws. We consider the numerical treatment of a scattering …

Time-dependent electromagnetic scattering from thin layers

J Nick, B Kovács, C Lubich - Numerische Mathematik, 2022 - Springer
The scattering of electromagnetic waves from obstacles with wave-material interaction in
thin layers on the surface is described by generalized impedance boundary conditions …

Runge–Kutta convolution coercivity and its use for time-dependent boundary integral equations

L Banjai, C Lubich - IMA Journal of Numerical Analysis, 2019 - academic.oup.com
A coercivity property of temporal convolution operators is an essential tool in the analysis of
time-dependent boundary integral equations and their space and time discretizations. It is …

Numerical analysis for electromagnetic scattering with nonlinear boundary conditions

J Nick - Mathematics of Computation, 2024 - ams.org
This work studies time-dependent electromagnetic scattering from obstacles whose
interaction with the wave is fully determined by a nonlinear boundary condition. In particular …

Time-dependent acoustic scattering from generalized impedance boundary conditions via boundary elements and convolution quadrature

L Banjai, C Lubich, J Nick - IMA Journal of Numerical Analysis, 2022 - academic.oup.com
Generalized impedance boundary conditions are effective approximate boundary conditions
that describe scattering of waves in situations where the wave interaction with the material …