WORK IN PROGRESS
In this example, we will investigate the creation and evolution of vortices in a simple pre-defined cube with periodic boundaries. For this simple geometry we even do not need seeder. The case is based on the well-known Taylor-Green vortex benchmark case, which is subject of the following papers:  Brachet, M. E., Meiron, D. I., Nickel, B. G., Morf, R. H., Frisch, U., & Orszag, S. A. (1983). Small-scale structure of the taylor-green vortex. Journal of Fluid Mechanics, 130, 411–452.  Brachet, M. E. (1991). Direct simulation of three-dimensional turbulence in the Taylor-Green vortex. Fluid Dynamics Research, 8(1–4), 1–8.  DeBonis, J. R. (2013). Solutions of the Taylor-Green vortex problem using high-resolution explicit finite difference methods. 51st AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition 2013, (February 2013).
The objectives of this example is to introduce how to: