Electroencephalography Forward Problem

A CutFEM discretization of the EEG forward problem (Nüßing 2018). Simulated with the DUNE based duneuro toolbox.

P1 Finite Element Examples

Results of the same finite element application running on different grids.

Details can be found in:

P. Bastian, M. Blatt, A. Dedner, C. Engwer, R. Klöfkorn, R. Kornhuber, M. Ohlberger, O. Sander. A Generic Grid Interface for Parallel and Adaptive Scientific Computing. Part II: Implementation and Tests in DUNE. Computing 82(2-3):121-138, 2008, Preprint.

Licensed under CC BY-SA 4.0.

Noisy image recovery using phase field models

Binary image recovery using a phase field approximation on a dynamic grid. BDE.

Licensed under CC BY-SA 4.0.

Blood flow

Blood flow through a narrowed carotid artery. Simulation of atherosklerosis. (Simulation by Stefan Wierling)

Licensed under CC BY-SA 4.0.

Soil Water Flow and Passive Solute Transport

DORiE simulation results for infiltration into a small-scale heterogeneous, hill-shaped domain (left), and for evaporation of contaminated water from a domain filled with a coarse and a fine-grained material (right) (Riedel et al. 2020).

Licensed under CC BY-SA 4.0.

Cahn-Larché

Solution snapshots of the Cahn-Larché equation on a locally refined UGGrid. C. Gräser, R. Kornhuber, and U. Sack. Numerical simulation of coarsening in binary solder alloys. Comp. Mater. Sci., 93:221–233, 2014 doi

Licensed under CC BY-SA 4.0.

SPE10 benchmark

Simulation of a five-spot injection scenario with a strongly heterogeneous domain (SPE10 benchmark) using an IMPES formulation on an adaptively refined grid. For details see dumux.

Licensed under CC BY-SA 4.0.

Heterogenous hip model

Heterogenous hip model with multiple coupled 3d and 1d grids. ECMath project A-CH1 Reduced basis methods in orthopedic hip surgery planning (Simulation by Jonathan Youett)

Licensed under CC BY-SA 4.0.

Root--Soil Interaction

Simulation of the water flow field in the soil and the root xylem of a growing white lupin system. For details see Koch et al 2018.

Licensed under CC BY-SA 4.0.

Pore-scale simulation using Cut-Cells

An unfitted dG cut-cell discretization of laminar flow at the pore-scale (Engwer 2009).

Licensed under CC BY-SA 4.0.

Large deformation contact

Large deformation contact problem. J. Youett, O. Sander, R. Kornhuber. A globally convergent filter-trust-region method for large deformation contact problems. SIAM J. Sci. Comp., accepted 2018 (Simulation by Jonathan Youett)

Licensed under CC BY-SA 4.0.

Parallel-adaptive higher order simulation of Forward Facing Step

Parallel-adaptive simulation of the Euler equations of gas dynamics using a stabilized 3rd order discontinuous Galerkin solver. DK.

Licensed under CC BY-SA 4.0.

More Info about DUNE Get started with DUNE Get involved in DUNE

DUNE Numerics

DUNE

DUNE, the Distributed and Unified Numerics Environment is a modular toolbox for solving partial differential equations (PDEs) with grid-based methods. It supports the easy implementation of methods like Finite Elements (FE), Finite Volumes (FV), and also Finite Differences (FD).

DUNE is free software licensed under the GPL (version 2) with a so called “runtime exception” (see license). This licence is similar to the one under which the libstdc++ libraries are distributed. Thus it is possible to use DUNE even in proprietary software.

The underlying idea of DUNE is to create slim interfaces allowing an efficient use of legacy and/or new libraries. Modern C++ programming techniques enable very different implementations of the same concept using a common interface at a very low overhead. Thus DUNE ensures efficiency in scientific computations and supports high-performance computing applications.

Particular highlights are

a generic grid interface, allowing to interface a range of very different grid implementations
the Iterative Solver Template Library, featuring an algebraic multigrid preconditioner
Highlevel interfaces for trial and test functions and generic discretization modules
Python binding for the full grid interface and a flexible concept to provide bindings for user modules.

Latest News

DORiE v2.0 Release and JOSS Publication

The recently released version 2.0 of DORiE was published in the Journal of Open Source Software (JOSS). The latest stable version adds a passive transport solver to the existing Richards solver and includes several options for finite volume (FV) and discontinuous Galerkin (DG) discretization schemes.

The Dune framework: Basic concepts and recent developments

This recently published open-access paper “The Dune framework: Basic concepts and recent developments“ presents the basic concepts and the module structure of the Distributed and Unified Numerics Environment (DUNE) and reflects on recent developments and general changes that happened since the release of the first Dune version in 2007 and the main papers describing that state (Bastian et al. 2008). This discussion is accompanied with a description of various advanced features, such as coupling of domains and cut cells, grid modifications such as adaptation and moving domains, high order discretizations and node level performance, non-smooth multigrid methods, and multiscale methods. A brief discussion on current and future development directions of the framework concludes the paper.

Gitlab Maintenance on 27th/28th July and Registry Clean Up

On the 27th and 28th of July we will have gitlab downtime due to maintenance reason. This means you won’t be able to reach

https://gitlab.dune-project.org/

during this time. Maintenance work will start on monday the 27th of July at 9am CEST (=UTC+2).

During this downtime we will clean up our registry. This means you should make sure that you can create all the images you have stored in the registry on your local machine. After the clean up you will be able to push it back into the new registry.

dune-grid-glue 2.7.0 released

A new version of dune-grid-glue, a module to provide various forms of couplings between different grids, has been released. The new dune-grid-glue 2.7.0 release is compatible with DUNE 2.7 and includes various bugfixes; there are no major new features in this release.

The module can be downloaded from the dune-grid-glue page.