The characterization of the interaction between two convection rolls from two cubic containers*

We present characterization of the large-scale circulations (LSCs) of turbulent Rayleigh- Bénard convection in two cubic cells. The two cells are connected through a half-open shared wall. We found two states when changing the tilting angle: counter rotating when the tilting angle is small, co-rotating when the tilting angle is big. We looked at how the states and the orientations of the LSCs change along the tilting angle, we found a plot of the preferred orientation as a function of tilting angle has hysteresis loop. We are testing whether an extended stochastic model based on Brown and Ahlers (Phys. Fluids, 2008) can describe the observed behaviors.