Dear all,

I have computed a stable 2D periodic solution with nektar++ time evolving the incompressible Navier-Stokes solver. Now I would like to analyse it's stability to spanwise-dependent perturbations. I have started doing this with time evolution, by using a homogeneous spanwise direction with just one mode and monitoring its growth rate. This is however extremely slow. I have noticed that in the user guide there's an example that does Floquet stability analysis on the periodic 2D vortex shedding solution of the flow around a cylinder, but unfortunately I haven't manage to find the conditions xml file used for the computations. Does anyone have it, so that I can use it to set up my Floquet analysis? I have doubts as to how a sequence of snapshots along a period are loaded and also about the differences between using Arpack or modified Arnoldi, among other issues. I would be very greatful if someone can send me an conditions file exemplifying the implementation of Floquet analysis. Many thanks in advance.

Cheers,

     Fernando Mellibovsky