70 citations · 223 across the 28 of their papers we have counts for
6 papers · 1 filter
A weighted reduced basis method for parabolic PDEs with random data
Christopher Spannring, Sebastian Ullmann, Jens Lang
This work considers a weighted POD-greedy method to estimate statistical outputs parabolic PDE problems with parametrized random data. The key idea of weighted reduced basis method…
A Bramble-Pasciak conjugate gradient method for discrete Stokes problems with lognormal random viscosity
Christopher Müller, Sebastian Ullmann, Jens Lang
We study linear systems of equations arising from a stochastic Galerkin finite element discretization of saddle point problems with random data and its iterative solution. We consi…
Extrapolation-Based Super-Convergent Implicit-Explicit Peer Methods with A-stable Implicit Part
Moritz Schneider, Jens Lang, Willem Hundsdorfer
In this paper, we extend the implicit-explicit (IMEX) methods of Peer type recently developed in [Lang, Hundsdorfer, J. Comp. Phys., 337:203--215, 2017] to a broader class of two-s…
Entropy-Preserving Coupling Conditions for One-dimensional Euler Systems at Junctions
Jens Lang, Pascal Mindt
This paper is concerned with a set of novel coupling conditions for the one-dimensional Euler system with source terms at a junction of pipes with possibly different cr…
Conditioning of implicit Runge-Kutta integration for finite element approximation of linear diffusion equations on anisotropic meshes
Weizhang Huang, Lennard Kamenski, Jens Lang
The conditioning of implicit Runge-Kutta (RK) integration for linear finite element approximation of diffusion equations on general anisotropic meshes is investigated. Bounds are e…
Adaptive Refinement Strategies for the Simulation of Gas Flow in Networks using a Model Hierarchy
Pia Domschke, Aseem Dua, Jeroen J. Stolwijk +2
A model hierarchy that is based on the one-dimensional isothermal Euler equations of fluid dynamics is used for the simulation and optimisation of gas flow through a pipeline netwo…