Videos

Output from Nektar-Driftwave proxyapp. An initial Gaussian density perturbation is time-evolved to the nonlinear turbulent state. More details can be found here - see alpha=2 example.

Shows convective flow in a 2D slot simulated using incompressible Navier-Stokes in the Boussinesq approximation. The Rayleigh number (basically specifying the temperature difference across the slot from the hot side on the left to the cold side on the right) is sufficiently high that boundary-layer instability leads to waves travelling up the hot side and down the cold. These waves lead to complex fluid motion in the bulk and ultimately turbulence. This the problem reported here

Time-evolution of the electron density for counter-propagating beams of matter governed by the collisionless Vlasov-Poisson equation. The beams are initially uniform in space (x-axis) and Gaussian in velocity (y-axis). The system develops a linear instability that leads to a nonlinear quasi-steady state. This work is reported here