21 citations · 22 across the 5 of their papers we have counts for
5 papers
A potential energy conserving finite element method for turbulent variable density flow: application to glacier-fjord circulation
Lukas Lundgren, Christian Helanow, Jonathan Wiskandt +2
We introduce a continuous Galerkin finite element discretization of the non-hydrostatic Boussinesq approximation of the Navier-Stokes equations, suitable for various applications s…
Theoretical results on a block preconditioner used in ice-sheet modeling: eigenvalue bounds for singular power-law fluids
Christian Helanow, Josefin Ahlkrona
The properties of a block preconditioner that has been successfully used in finite element simulations of large scale ice-sheet flow is examined. The type of preconditioner, based…
Increasing stable time-step sizes of the free-surface problem arising in ice-sheet simulations
André Löfgren, Josefin Ahlkrona, Christian Helanow
Numerical models for predicting future ice-mass loss of the Antarctic and Greenland ice sheet requires accurately representing their dynamics. Unfortunately, ice-sheet models suffe…
Effects of numerical implementations of the impenetrability condition on non-linear Stokes flow: applications to ice dynamics
Christian Helanow
The basal sliding of glaciers and ice sheets can constitute a large part of the total observed ice velocity, in particular in dynamically active areas. It is therefore important to…
Galerkin Least-Squares Stabilization in Ice Sheet Modeling - Accuracy, Robustness, and Comparison to other Techniques
Christian Helanow, Josefin Ahlkrona
We investigate the accuracy and robustness of one of the most common methods used in glaciology for the discretization of the -Stokes equations: equal order finite el…