GetDP

GetDP is an open source finite element solver using mixed elements to discretize de Rham-type complexes in one, two and three dimensions. GetDP is developed by the ACE group from the Montefiore Institute at the University of Liège, and is released under the GNU GPL.

Contents

Getting started

ONELAB allows to use GetDP as a black-box solver: you don't need to know anything about finite elements or de Rham complexes in order to run your first simulations:

1. Download the ONELAB bundle:
   • Desktop version for Windows 64 bit / 32 bit, Linux 64 bit / 32 bit and MacOSX
   • Mobile version for Android and iOS
   • Source code
2. Launch the app
3. Open a GetDP model:
   • Desktop version: go to the File/Open menu and select a GetDP .pro file, e.g. models/magnetometer/magnetometer.pro
   • Mobile version: select one of the preloaded models
4. Press Run.

GetDP models

Basic templates

These are basic physical templates, that can either be used interactively to define new problems from scratch, or be included in other problem definition files.

Electrostatics Magnetostatics

Featured physical models

These are complete, parametric application examples, ready to be solved and modified.

Acoustics	Electromagnetism	Heat transfer	Multi-physics
Multiple scattering Time reversal	Simple inductor/core system Forces on magnets Rotating electric machines Antennas Waveguides Shielding effectiveness Bloch modes in periodic waveguides Superconducting wire	Thermal conduction	Electromechanical relay Induction heating (electro-thermal) Magnetometer (electromechanical, thermal) Magnetostriction (magnetic, mechanical)

Advanced numerical techniques

Domain decomposition methods for waves

All models

All GetDP models

How does it work?

GetDP input files (.pro files) can be instrumented to share parameters with the ONELAB server, through the same syntax as the one used in Gmsh.

Building GetDP from the source code

If you want to recompile GetDP directly from the source code, you should

• Download PETSc from http://www.mcs.anl.gov/petsc/petsc-as/download/

• Uncompress the PETSc archive (in this example, using PETSc 3.7.4):

tar zxvf petsc-3.7.4.tar.gz

• Configure and build PETSc. The configuration options depend on the calculations you want to perform (complex- or real-valued), as well as your compiler setup. For a sequential build (without MPI), run (remove --with-scalar-type=complex to build in real arithmetic):

cd petsc-3.7.4
export PETSC_DIR=$PWD
export PETSC_ARCH=complex_mumps_seq
./configure --with-clanguage=cxx --with-debugging=0 --with-mpi=0 --with-mpiuni-fortran-binding=0 --download-mumps=yes --with-mumps-serial --with-shared-libraries=0 --with-x=0 --with-ssl=0
make
cd ..

• Download and unzip the Gmsh and the GetDP source code from the ONELAB bundle http://onelab.info/files/gmsh-getdp-source.zip

• Configure, compile and install a minimal Gmsh library (it will be used by GetDP):

cd gmsh-xxx
mkdir lib
cd lib
cmake -DDEFAULT=0 -DENABLE_PARSER=1 -DENABLE_POST=1 -DENABLE_BUILD_LIB=1 ..
make lib
sudo make install/fast
cd ../..

• Configure and compile GetDP:

cd getdp-xxx
mkdir bin
cd bin
cmake ..
make
cd ../..