17 citations · 19 across the 6 of their papers we have counts for
7 papers
A modified convolution quadrature combined with the method of fundamental solutions and Galerkin BEM for acoustic scattering
Ebraheem Aldahham, Lehel Banjai
We describe a numerical method for the solution of acoustic exterior scattering problems based on the time-domain boundary integral representation of the solution. As the spatial d…
Implicit/explicit, BEM/FEM coupled scheme for acoustic waves with the wave equation in the second order formulation
Lehel Banjai
Acoustic scattering of waves by bounded inhomogeneities in an unbounded homogeneous domain is considered. A symmetric coupled system of time-domain boundary integral equations and…
A posteriori error analysis for approximations of time-fractional subdiffusion problems
Lehel Banjai, Charalambos G. Makridakis
In this paper we consider a sub-diffusion problem where the fractional time derivative is approximated either by the L1 scheme or by Convolution Quadrature. We propose new interpre…
Numerical analysis of a wave equation for lossy media obeying a frequency power law
Katherine Baker, Lehel Banjai
We study a wave equation with a nonlocal time fractional damping term that models the effects of acoustic attenuation characterized by a frequency dependence power law. First we pr…
Strong convergence of a Verlet integrator for the semi-linear stochastic wave equation
Lehel Banjai, Gabriel Lord, Jeta Molla
The full discretization of the semi-linear stochastic wave equation is considered. The discontinuous Galerkin finite element method is used in space and analyzed in a semigroup fra…
Time-dependent acoustic scattering from generalized impedance boundary conditions via boundary elements and convolution quadrature
Lehel Banjai, Christian Lubich, Joerg Nick
Generalized impedance boundary conditions are effective, approximate boundary conditions that describe scattering of waves in situations where the wave interaction with the materia…