GetDP

GetDP is a rather general 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 latest nightly builds of Gmsh (for Windows, MacOS X or Linux) and GetDP (for Windows 32 bit/64 bit, MacOS X 32 bit/64 bit or Linux 32 bit/64 bit).
2. Uncompress the 2 archives (no installation necessary; you can move them to any directory).
3. Double-click on the Gmsh executable (gmsh.exe
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   on Windows); a graphic window and a command window will open.
4. Load one of the geometries through the File/Open menu (e.g. the file magnet.geo for the Template:GetDPFile example below); the geometry will appear in the graphic window.
5. Go to the Solver module (by clicking on the Geometry button in the command window, then selecting Solver).
6. Click on the GetDP button (the first time you will need to specify the location of the GetDP executable, e.g. getdp.exe on Windows; this depends on where you uncompressed the archives in step 2).
7. Click on Compute.
8. ... that's it!

Give it a try on the Template:GetDPFile example (the underlying model is explained in more details in the Magnetostatics section):

• Magnet-2.png

  Launching Gmsh opens a graphic window (left) and a command window (right). Load magnet.geo with the File/Open menu.

• Magnet-3.png

  With the magnet.geo geometry loaded, go to the Solver module.

• Magnet-4.png

  Click on the GetDP button.

• Magnet-5.png

  Click on Compute in the ONELAB window: this will run GetDP and display the results. You can change any parameter and run Compute again.

Electromagnetics

• Electrostatics
  • Capacitor, microstrip line, high-voltage isolator
• Electrokinetics
  • Steady currents in conductors
• Magnetostatics
  • Linear C-shaped magnetic core, Non-linear core
• Magnetodynamics
  • Eddy currents in a plate, switched reluctance motor, synchronous and asynchronous machine
• Wave propagation
  • Waveguide, parabolic reflector, dipole antenna, microstrip antenna, optical fiber, invisibility cloak, plasmonics

Acoustics

• Time-harmonic scattering (Helmholtz equation)
  • Multiple scattering with Sommerfeld ABC and with Perfectly Matched Layer (PML)

Heat transfer

• Heat transfer

Generic PDEs

• Elliptic equations
  • Laplace equation with Neumann boundary condition
  • Laplace equation with Dirichlet boundary condition
  • Coupled problems
• Parabolic equations
  • Heat equation with Dirichlet boundary control
• Hyperbolic equations