Rayleigh-Benard-convection in two dimensions

Simulation of twodimensional Rayleigh-Benard-convection.
A fluid of initially uniform temperature is heated from below and cooled from above.
The temperature is color-coded; the color transition black-red-orange-yellow-white corresponds to a transition from cold to hot fluid.

[@Avid6eek]

What software was used to create this simulation?

[@rmc258psu]

What are the sidewall boundary conditions? Is the simulation in temperature or velocity?

[@KillianDefaoite]

The side wall BCs are clearly periodic. The color describes the temperature (read the description).

[@mujikag]

what Rayleigh number?

[@camilaalvarenga7449]

GM I k uh
Ugh