Скачать с ютуб Flow topology dynamics of a turbulent air-filled Rayleigh-Bénard convection at Ra1e8 and 1e10 в хорошем качестве

Flow topology dynamics of a turbulent air-filled Rayleigh-Bénard convection at Ra1e8 and 1e10

Two direct numerical simulations of an air-filled (Pr=0.7) Rayleigh-Bénard configuration at Ra=1e8 and 1e10, respectively. It displays the time evolution of the small-scale flow structures based on a novel Q-like criterion. Simulations were carried out on the MareNostrum4 supercomputer using: (i) for Ra=1e8: 128CPUs and a 17M mesh (400x206x206), and (ii) for Ra=1e10: 1024CPUs and a 600M mesh (1024x766x766). The grid is stretched out away from solid walls through a tanh-function. Numerically, the governing equations were discretized in space on a Cartesian staggered grid using a finite-volume symmetry-preserving scheme. For details, see: F.Dabbagh, F.X.Trias, A.Gorobets, and A.Oliva. "Flow topology dynamics in a three-dimensional phase space for turbulent Rayleigh-Bénard convection". Physical Review Fluids, 5:024603, 2020. https://doi.org/10.1103/PhysRevFluids... F. Dabbagh, F.X. Trias, A. Gorobets, and A. Oliva. "On the evolution of flow topology in turbulent Rayleigh-Bénard convection", Physics of Fluids, 28:115105, 2016. http://dx.doi.org/10.1063/1.4967495 Data is publicly available at: https://www.cttc.upc.edu/downloads/RBC/