This snapshot was taken from a movie based on data from a Rayleigh-Bénard convection simulation. The system is a fluid heated from below and cooled from above with periodic sidewalls and impermeable horizontal plates. The visible quantity is the temperature of the fluid, where red and blue indicate hot and cold fluid, respectively. Using the volume rendering with ray casting and an opacity profile dependent on the temperature, the mean temperature has been made transparent. This results in the temperature extrema being clearly visible and the possibility to see through the system, revealing the 3D structure. One can clearly distinguish the small scale thermal plumes and the large scale circulation, both characteristic coherent structures in this type of flow.

Credits

Image	Image(s) courtesy of Erwin P. van der Poel & Rodolfo Ostilla Mónico
Compute	Compute resources courtesy of SURFsara

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