*Computational thinking is going to be a defining feature of the future—and it’s an incredibly important thing to be teaching to kids today….*” Continue reading →

# New paper on Waveform Relaxation for Multiscale Problems

This paper proposes the application of the waveform relaxation method to the homogenization of multiscale magnetoquasistatic problems. In the monolithic heterogeneous multiscale method, the nonlinear macroscale problem is solved using the Newton–Raphson scheme. The resolution of many mesoscale problems per Gauss point allows to compute the homogenized constitutive law and its derivative by finite differences. In the proposed approach, the macroscale problem and the mesoscale problems are weakly coupled and solved separately using the finite element method on time intervals for several waveform relaxation iterations. The exchange of information between both problems is still carried out using the heterogeneous multiscale method. However, the partial derivatives can now be evaluated exactly by solving only one mesoscale problem per Gauss point. Continue reading →

# Workshop on Order-Reduction Methods 2016

# EMTS 2016 is over

URSI Commission B’s International Symposium on Electromagnetic Theory (EMTS 2016) has been held from 14–18 August 2016 in Espoo, Finland. We presented in the Session of numerical time domain methods on Monday the contribution “An Application of ParaExp to Electromagnetic Wave Problems” (Melina Merkel, Innocent Niyonzima and Sebastian Schöps).

Continue reading# How to build GNU Octave with Qt5 on the Mac

The graphical user interface of Octave 4.0 can only be compiled with Qt4. Homebrew is dropping 4.x support and moving towards 5.x. Several Octave dependencies have already been updated (e.g. Qscintilla2, see e.g. this issue. However, the upcoming Octave 4.2 (release is scheduled for September 2016) will have full Qt5 as discussed here.

The standard installation uses the command line interface. If you need Octave with graphical user interface then this should workbrew update brew upgrade #to get the latest qscintilla brew install octave --with-gui --HEAD

**Update**: The post has been edited on Aug 20 since the new formula is now available in homebrew’s science repository.

# Gmsh 2.13.1 and GetDP 2.9.0 in homebrew/science

Homebrew’s science repository includes now (again) the most recent versions of Gmsh 2.13.1 and GetDP 2.9

brew tap homebrew/science brew install gmsh --with-fltk brew install getdp

# Talk on the simulation of electrical machines by Lars Kielhorn

*Electrical machines commonly consist of moving and stationary parts, e.g., an electric motor features a rotor and a stator. If volume based numerical schemes such as the Finite Element Method (FEM) are applied the electromagnetic simulation of such devices is a challenging task since the variation of the geometrical configuration needs to be incorporated into the numerical scheme. Continue reading*