Electrostatics with floating potentials

Electrostatic microstrip with floating potentials
Browse model files — Download zip archive

Quick start

To run the model, open floating.pro with Gmsh and click on the "Run" button in the left panel.

Features addressed in this tutorial

• Global quantities and their special shape functions (see picture above)
• Computation of the energy dual, i.e. of the armature charge of the electrode
• More on ONELAB parameters (flags, model options, check boxes, menus, ...)

Additional information

This is a further step building on the electrostatic 2D model of a microstrip (tutorial 1). We show in this tutorial how GetDP takes advantage of global quantities and the associated global basis functions

• to reduce the number of unknowns
• to deal with floating potentials
• to compute efficiently the electrode charges, which are the energy duals of the electrode voltages
• to compute output quantities (charges, armature voltages, capacitances, ...) that can be immediately used in a external circuit.

References

1. GetDP documentation