Kolmogorov forced turbulence HD

This movies shows a subdomain of a two-dimensional, incompressible hydrodynamic simulation. The color represents vorticity. The flow initially has small random perturbations and subjects to Kolmogorov forcing. The simulation was done with grid size 4096x4096 on an nVidia GeForce GTX 580 card. I used only single precision float and reached 130 GFLOPS. The simulation software is written in CUDA C and available for free on http://fermi.mycloudnas.com/cgit.cgi/sg2/ . It uses Galerkin spectral method with 4th low-storage Runge-Kutta time integrator. I would like to thank PDC ( http://www.pdc.kth.se ) for providing the Zorn cluster, which makes the development possible. The Zorn cluster is named after a painter Anders Zorn ( http://en.wikipedia.org/wiki/Anders_Zorn ) because it has GPUs.